The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Reply
 
Thread Tools Search this Thread
Old December 1, 2017, 01:03 PM   #1
TheLastGoodFight
Member
 
Join Date: August 2, 2016
Location: Eastern OK
Posts: 59
.357 Loads in .38 casings

Good afternoon all,

I have an abundance of .38 casings and no real interest in .38 revolvers, so I've attempted a few experiments in putting .357 level loads in .38 casings with my Ruger OM BH.
I'd like to know who has attempted this, what dies you use, and what pressure differences I can expect out of the shorter casing. So far my attempts have been unsuccessful because my RCBS dies will not crimp a .38 casing in spite of the claim that they can. The casings are simply too short to reach the crimp groove no matter what adjustments I make.
Still, I would like to know who of you have done this successfully and what resulted. It would be a big help.
TheLastGoodFight is offline  
Old December 1, 2017, 01:09 PM   #2
Bayou
Senior Member
 
Join Date: March 8, 2016
Location: SE Louisiana
Posts: 300
I haven't done that, and wouldn't try it either. The pressures of a 357 charge dropped in a 38SPL case could lead to a catastrophic result...
__________________

Bayou
NRA Life Member
"Keep Calm and Reload"
Bayou is offline  
Old December 1, 2017, 01:10 PM   #3
TheLastGoodFight
Member
 
Join Date: August 2, 2016
Location: Eastern OK
Posts: 59
Thanks for that bit of info. Would that be the case even if I were loading a bit down from what the manual says?
TheLastGoodFight is offline  
Old December 1, 2017, 01:21 PM   #4
Bayou
Senior Member
 
Join Date: March 8, 2016
Location: SE Louisiana
Posts: 300
I have no way of actually measuring pressures. That's why I stick to the charge limitations listed in the loading data manuals. I personally could not recommend anyone doing anything other than that.

Loading beyond the charge limits listed in the manuals means that you're simply assuming the risk of anything going wrong. Not what you want do. Could lead to a "bad day"... and it would be all your fault to boot...

Just my $0.02...
__________________

Bayou
NRA Life Member
"Keep Calm and Reload"
Bayou is offline  
Old December 1, 2017, 01:37 PM   #5
USSR
Senior Member
 
Join Date: November 14, 2017
Location: Finger Lakes Region of NY
Posts: 1,442
TheLastGoodFight,

You say ".38 casing". If you are using .38 Special cases, there is simply no reason why you shouldn't be able to crimp a .38 Special case using .38 Special/.357 Magnum dies if you have your seater die set up correctly. While the .357 Magnum got inspired by guys like Elmer Keith loading up .38 Special cases to near .357 Magnum levels, it is not a good idea to do so. Oh, the case can take it. It's just the chance that at some time in the future someone could fire it in a .38 Special revolver with disastrous results.

Don
__________________
NRA Life Member
NRA Certified Metallic Cartridge Reloading Instructor
USSR is offline  
Old December 1, 2017, 02:07 PM   #6
KW Gary M
Senior Member
 
Join Date: January 28, 2009
Location: Key West
Posts: 162
Looking at the pros and cons I wouldn't try loading 38 Special brass to 357 Mag specs even if you do shoot it out of a 357 Mag revolver. Why not just load them as 38 Specials and use them for range plinking out of your 357 Mag revolver?

Pros: It might work out fine.

Cons: It might blow up your gun, it might injure yourself or someone else, it might void any warranty you have on your gun.
__________________
To say that guns kill people is to say that automobiles drive drunk and matches commit arson....
KW Gary M is offline  
Old December 1, 2017, 02:35 PM   #7
T. O'Heir
Senior Member
 
Join Date: February 13, 2002
Location: Canada
Posts: 12,453
I'd suspect that .357 loads just won't physically fit in a .38 case with the bullet in place. Depends on the powder of course, but a jacketed 158 .357 Max load is 6.9 grains of HP-38. Same bullet and powder in .38 Special is 4.3. The difference in pressure is 24,100 PSI too. Shot out of a .357 revolver it's not going to damage anything. Unless somebody thinks they're .38 Special and fires 'em out of a .38 Special revolver. Most likely a very ugly and instant KABOOOOOOM!!!!!
There is no difference other than the length in the actual cases, but I don't think you'll get 6.9 of HP-38 in a .38 Special case with the bullet in correctly.
In any case, it's a very bad thing to be playing with. If you don't want the .38 brass, you should sell it.
__________________
Spelling and grammar count!
T. O'Heir is offline  
Old December 1, 2017, 03:09 PM   #8
TheLastGoodFight
Member
 
Join Date: August 2, 2016
Location: Eastern OK
Posts: 59
Thanks for saving me from a bad day. I appreciate all the info.
TheLastGoodFight is offline  
Old December 1, 2017, 03:45 PM   #9
Unclenick
Staff
 
Join Date: March 4, 2005
Location: Ohio
Posts: 21,061
CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.



The .357 Magnum was developed in large part by Elmer Keith, who loaded up .38 Special cases in heavy framed revolvers. He came up with loads that reached .357 pressures and then some, but because they could damage lighter .38 Special revolvers, when the time came to commercialize these loads, the longer .357 Mag case was created to prevent them being accidentally chambered in a .38 Special. The Magnum case is 0.135" longer, but the SAAMI COL for the .357 Magnum is only 0.040" longer. Bullets for the .357 were made with cannelures and crimp grooves are further forward on the bullet for this reason, as a .38 Special bullet might protrude from the cylinder of a magnum revolver if crimped into its lower (from the tip) cannelure or crimp groove.

Additionally, some manufacturers make their .357 Magnum brass thicker near their heads than their .38 Special brass is. I don't know if that is out of an overabundance of caution or if it is an illusion created because they started making .38 Special heads thinner in order to save brass and knew they could get away with it. Either way, when I look in QuickLOAD, I see only 2 grains of water overflow capacity difference in the two cases, even though the added length of the .357 should produce about 4 grains added water capacity. That lower difference is due to head region thickness.

Assuming that difference holds up for brands not tested by QuickLOAD's author, seating the same 158 grain JHP at the maximum COL in both cartridges with the same load gives essentially identical pressures. However, I would be checking that the case water overflow capacity of my .357 and .38 Special cases really were only 2 grains different¹, as they were for QuickLOAD's author. If so, I would keep in mind that the .38 Special heads are lighter, and keep an extra careful eye out for signs of case head expansion, incipient head separation and expansion of primer pockets.

If your .38 Special and .357 Magnum cases have 4 grains of difference in water capacity, run the .357 loads about 8% lighter in the Special cases to keep a matching pressure.


¹Measure this by weighing the case, filling it with water level at the mouth (no meniscus) and weighing it again. The difference in the two weights is the water overflow capacity of the case. With a higher pressure rifle cartridge, you always do this with the as-fired case. With lower pressure pistol and handgun cartridges, you do it with the case resized. The .357 Mag is right in the middle, but since the .38 calls for resized brass and you want to compare apples to apples, I would resize both first, in this instance.
__________________
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member and Golden Eagle
Unclenick is offline  
Old December 1, 2017, 04:45 PM   #10
gwpercle
Senior Member
 
Join Date: November 30, 2012
Location: Baton Rouge, Louisiana
Posts: 1,752
I've been doing it for 50 years. It's not a new idea but you have to use the correct bullet. Lyman # 358156 , 155 grain SWC , this bullet has a gas check, a lube groove and two crimping grooves. For loading 38 special loads in 38 special brass or loading 357 mag. loads in 357 magnum cases you crimp in the top groove.
The lower groove is used when you want to load 357 mag. loads in....38 special cases !
Crimping in the lower groove gives you magnum case capacity in the special shell.
Works like a charm. Skeeter Skelton liked this design for this reason.
Lyman still makes this mould . I do not know if anyone sells the bullets already cast.
Any dies that work for cast bullets can be used. Lyman, RCBS and CH4D are the sets I have picked up over the years ....they all work .
When doing this use stay away from the top Maximum 357 Magnum loads... I use this bullet , 38 special cases , seat bullet in the lower groove , over 6.5 grains of Unique for about 1000 fps , hotter than a 38 special but not a screaming meanie !

Gary

Last edited by gwpercle; December 1, 2017 at 05:00 PM.
gwpercle is offline  
Old December 1, 2017, 04:57 PM   #11
Hanshi
Senior Member
 
Join Date: April 23, 2017
Posts: 239
Gwpercle is correct. However, I would confine these loads to midrange .357 velocities - say 1100 fps to 1200 fps. Don't want to accidentally chamber one in a .38spl revolver.
Hanshi is offline  
Old December 1, 2017, 05:23 PM   #12
joed
Senior Member
 
Join Date: November 28, 2014
Posts: 442
The problem in loading super hot .38 Spl ammo is that some day you may buy a .38 Spl revolver and forget what load is in those cases.

It's been done but I wouldn't do it as I own .38 Spl revolvers. If I died I'd hate to see someone try that ammo in a Colt DS.
__________________
The 6 gun was once as common as the cellphone is today, and just as annoying when it went off in the theater.
joed is offline  
Old December 1, 2017, 05:32 PM   #13
higgite
Senior Member
 
Join Date: October 21, 2010
Posts: 1,025
A .357 Magnum load in a case headstamped ".38 Special". What could go wrong?
higgite is offline  
Old December 1, 2017, 05:52 PM   #14
rodfac
Senior Member
 
Join Date: January 22, 2005
Location: Kentucky
Posts: 3,623
Quote:
I've been doing it for 50 years. It's not a new idea but you have to use the correct bullet. Lyman # 358156 , 155 grain SWC , this bullet has a gas check, a lube groove and two crimping grooves. For loading 38 special loads in 38 special brass or loading 357 mag. loads in 357 magnum cases you crimp in the top groove.
Me too. It's a great bullet, the very best home cast design I've ever tried in both handgun and carbine. My Marlin will throw carefully cast, sized and culled bullets into tight 1-1/4" 5-shot clusters at 100 yds with a 2.5x scope mounted. It'll do the same with any of my handguns at 25 yds from a rest. It's a hellofa bullet.

BTW, loads in .357 or .38 Spl brass loaded in this manner chronograph within 25 fps of each other...same pressure!

Short of that design, I'd never load .357 level loads in magnum brass. Rod
__________________
Cherish our flag, honor it, defend it in word and deed, or get the hell out. Our Bill of Rights has been paid for by heros in uniform and shall not be diluted by misguided governmental social experiments. We owe this to our children, anything less is cowardice. USAF FAC, 5th Spl Forces, Vietnam Vet '69-'73.

Last edited by rodfac; December 1, 2017 at 05:59 PM.
rodfac is offline  
Old December 1, 2017, 07:06 PM   #15
USSR
Senior Member
 
Join Date: November 14, 2017
Location: Finger Lakes Region of NY
Posts: 1,442
Quote:
I'd suspect that .357 loads just won't physically fit in a .38 case with the bullet in place.
TheLastGoodFight,

The reason you weren't able to reach the crimp groove of the bullet wasn't because you were putting the powder charge weight of a .357 Magnum load into a .38 Special case, was it?

Don
__________________
NRA Life Member
NRA Certified Metallic Cartridge Reloading Instructor
USSR is offline  
Old December 1, 2017, 08:22 PM   #16
44 AMP
Staff
 
Join Date: March 11, 2006
Location: Upper US
Posts: 28,820
Quote:
So far my attempts have been unsuccessful because my RCBS dies will not crimp a .38 casing in spite of the claim that they can. The casings are simply too short to reach the crimp groove no matter what adjustments I make.
Check your dies (seater). The usual practice is to sell .38/357 dies, BUT there have been sets of .357 (only) dies made. If you have a .357 seater, and not a .38/357 then you won't be able to crimp .38 cases. If its not clear, call RCBS and give them the numbers on the die, they should be able to tell you.

Lets be clear about something, there are .357 LEVEL loads you can put in .38 Special cases, and there are .357 LOADS you can put in .38 cases, and they are not the same thing.

In other words, you use less powder to get .357 pressure in a .38 case than you would in a .357 case. Using the full .357 powder charge WEIGHT, will generate HIGHER than .357 pressure in the smaller .38 Special case.

Will it be enough to blow up your gun?? A .357, probably not, but it won't be a good thing. Will it blow up a .38?? POSSIBLY, if it's a small, lightly built gun.

The real risk, and the reason its a BAD IDEA loading .38 cases with magnum level loads is simply the same reason the .357 case was made longer than the .38 case. Its not to contain the magnum pressure, its to keep the magnum loads OUT of .38 special revolvers that are not made to take them.

Now, YOU might be sure you'll never make that mistake, YOU might not even have a .38 revolver to risk it in, but can you be certain no one else will ever (including your heirs) get their hands on any of that ammo, and NOT know its isn't safe in a .38??

IT's a safety issue, and not an insignificant one. IF you do it, any accident/problem that resuts (ever) is your responsibility.

As has been mentioned, the .357 was developed in .38 cases, and there was a .38/44 cartridge, which was a heavy (almost .357mag) load in .38 Special cases, intended for use ONLY in large "44 frame" size revolvers. (don't confuse that .38/44 with the much later .38/44 Bain & Davis, which was a 44 case necked down to .38 caliber. They are totally different, other than the bullet size.)

DO NOT just drop a powder charge weight from a .357 load table into a .38 case and load a bullet on it. I'm pretty sure you won't be happy with the results.
__________________
All else being equal (and it almost never is) bigger bullets tend to work better.
44 AMP is offline  
Old December 2, 2017, 07:16 AM   #17
res45
Senior Member
 
Join Date: September 15, 2007
Location: NC
Posts: 753
I have about three coffee cans of 38 special brass and only 357 revolvers to shoot them in. when I bought my first custom mold I specifically purchased an NOE clone of the Ray Thompson Lyman 358156 gas check mold so I could crimp in the lower groove and load the bullets long in 38 special cases.

I don't plan on loading any really hot loads but something in the range of 1100 fps. works just fine.

Bullet loaded in 38 special and 357 Mag. cases.


The bullet I'm using.
res45 is offline  
Old December 2, 2017, 08:57 AM   #18
Real Gun
Senior Member
 
Join Date: May 19, 2004
Location: SC
Posts: 2,743
Buy 500 Starline .357 cases for $80...problem solved.
__________________
Not an expert, just a reporter.
Real Gun is offline  
Old December 2, 2017, 01:59 PM   #19
gwpercle
Senior Member
 
Join Date: November 30, 2012
Location: Baton Rouge, Louisiana
Posts: 1,752
res45,
With the NOE mould and your alloy , how much do the NOE358156 clones weigh?
Those hollow points look wicked and a 4 cavity NOE is nice to cast with...makes lots of bullets. My single cavity Lyman HP is so slow I don't use it any longer.
Christmas present maybe !
Gary
gwpercle is offline  
Old December 2, 2017, 03:22 PM   #20
res45
Senior Member
 
Join Date: September 15, 2007
Location: NC
Posts: 753
Gary, mine is only a 2 cavity which is all I could afford at the time I bought it several years ago. The mold is still listed on the website but I don't know if he has any of the HP versions in stock.

The alloy I'm using is 50/50 Lead / Wheelweights, powder coated a gas checked if needed the bullet weighs 159 gr. The mold is specified to cast bullets at 160 grs.

As to gas checks, I have found that the aluminum checks sold by Sage Outdoors designed for plain base bullets easily fit over the gas check shank of bullets that have been powder coated.
res45 is offline  
Old December 2, 2017, 09:50 PM   #21
briandg
Senior Member
 
Join Date: May 4, 2010
Posts: 5,468
This maY have already been mentioned, but nobody should load this sort of thing.

Put together a few hundred rounds of this without clearly labeling it as DANGEROUS could cause catastrophic failure if someone using a light gun somehow wound up with them.

It will probably happen, believe it. Everyone dies, and there are always many personal assets that wind up in the hands of others.
__________________
None.
briandg is offline  
Old December 3, 2017, 10:09 AM   #22
mavracer
Senior Member
 
Join Date: February 27, 2008
Location: midwest
Posts: 4,209
Had a guy in the LGS who had followed this practice, he had some of the ammo stolen from his truck and ended up being sued by the thief. He said he won but he had to get an attorney that I'm sure cost more than a lifetime supply of 357 brass would.
Now I never checked court records and this could have been BS, but in today's litigation happy society it wouldn't surprise me.
__________________
rather be judged by 12 than carried by 6
Quote:
originally posted my Mike Irwin
My handguns are are for one purpose only, though...
The starter gun on the "Fat man's mad dash tactical retreat."
mavracer is offline  
Old December 3, 2017, 10:22 AM   #23
Jim Watson
Senior Member
 
Join Date: October 25, 2001
Location: Alabama
Posts: 18,539
Skeeter Skelton loaded the Thompson GC bullet to low end magnum performance in Special brass. He said he could get that free from his department, use it a few times and then relegate it to light target loads.

When the .357 was new and wonderful, Phil Sharpe showed The Same loads in "heavy frame" .38s as he did for .357 Magnum. Those loads would fry the circuitry of the average Internet Reloading Expert's computer.

But we are more careful, now.
Jim Watson is offline  
Old December 3, 2017, 03:42 PM   #24
m&p45acp10+1
Senior Member
 
Join Date: May 3, 2009
Location: Central Texas
Posts: 3,930
The only time I have seen Special brass used for Magnum loads was when the 190 grain bullets were used. When loading them in the magnum cases they were too long for the cylinder on most Magnum chambered guns. To combat this they loaded them in a Special case. Note they were way too long to go into a Special cylinder. The bullet would stick out of one end, and the rim out of the other.
__________________
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.
m&p45acp10+1 is offline  
Old December 3, 2017, 04:20 PM   #25
Tsquared
Senior Member
 
Join Date: January 26, 2016
Location: NE Atlanta
Posts: 337
RES 45 said:
Quote:
Bullet loaded in 38 special and 357 Mag. cases.
Back in the 70's my dad would load his 357 with his cast 150ish gr SWC's in 38Spl cases long as RES45 described. They were not quite a magnum load but they were way beyond a 38Spl max load. He only had the Security Six 357 Mag so there was no worry about his loads ending up in a 38 pistol. The Security Six was the truck gun that stayed in the glovebox in the old farm truck.

When I started driving I drove the old farm truck and started shooting that gun a lot. I continued the loading practice as the SWC's were very accurate loads. With full powered 357MAG loads the gun was not as accurate. I shot more mouse fart 100gr lead CN in that gun than anything else but we always kept SWC's in it.
Tsquared is offline  
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 08:58 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2021 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Page generated in 0.07635 seconds with 10 queries