10mm to 40sw

Marineinthewoods · December 22, 2008, 11:06 PM

This may be an old discussion but.. Has anyone had experience trimming 10mm to use in a 40sw? I've been finding a lot of 10mm brass at the range lately. Thanks

aaalaska · December 23, 2008, 12:14 AM

probably trade that a lot easier. Alex

David Wile · December 23, 2008, 12:25 AM

Hey Marine,

One can certainly trim 10MM cases to 40S&W cases, but like Alaska suggested, it would probably be less hassle to simply trade them with someone.

Best wishes,
Dave Wile

Shoney · December 23, 2008, 12:39 AM

Marineinthewoods
WELCOME to TFL!

The web area of the 10mm is thicker than on a 40S&W. If you load a trimmed 10mm case to a max 40S&W load, you will be over pressure or worse yet spike a higher pressure, because of the reduce case volume.

Loading mid range 40's should be fine.

English Bob · December 23, 2008, 01:03 AM

The .40 was develpoed by shortening the 10mm, but they decided to switch to a small pistol primer for the .40.

The problem arose from chambering the smaller 9mm size platforms for the .40. If I recall, when using the large primer the ejector could contact the primer when clearing the chamber of a live round. Hence the switch to the small primer.

If you trim 10mm cases you will have to use large pistol primers. Something to think about.

Trimming is no fun anyways.

BurkGlocker · December 23, 2008, 04:12 AM

Like the others have said, you could probably trade the 10mm for .40s or better yet sell the 10mm brass. You can always tell the 10mm shooters at the range that reload because they are the ones on their hands and knees searching for the ejected brass...

DWARREN123 · December 23, 2008, 04:15 AM

Trade or sell it for 40 S&W brass.

CowTowner · December 23, 2008, 05:21 AM

I'd be happy to discuss a trade of 40 S&W brass for 10mm brass.
PM me, please.

Foxbat · December 23, 2008, 01:15 PM

I will gladly swap your 10mm brass for .40's. Send me an email.

jsflagstad · December 23, 2008, 01:33 PM

I asked the same question a couple of years back. What I was told is that the web area is thicker and teh "Internal Ballistics" would be different due to that.

So trade it, it's worth more anyway.

JSF

Shoney · December 23, 2008, 03:00 PM

NO! NO! NO!

Do not send it to those other guys. It is dangerous to possess. Send it to mme, and I will loa----ahhh---errrrr-- dispose of it for you!

Gee! I am feeling so good today I won't even charge you a disposal fee.

FrankenMauser · December 23, 2008, 03:41 PM

Quote:

I asked the same question a couple of years back. What I was told is that the web area is thicker and teh "Internal Ballistics" would be different due to that.

So trade it, it's worth more anyway.

Exactly

Most places will buy 10mm brass from you for more than you'll be paying for an equal amount of .40 S&W. (or sell it privately)

Marineinthewoods · December 23, 2008, 04:56 PM

Thanks for the input, I'll give the trade some thought, don't really need anymore 40sw though. The 10mm to 40 is more of a curiosity on my part. Now if you want to trade some lake city 556 brass for it...

sungsam2 · December 23, 2008, 08:46 PM

Can anyone tell me what a safe load would be for 160gr 10mm using HS6 powder? .. i've tried 10 grs already feels like a .22... i've been waiting to shoot my delta elite for a year!!

Shoney · December 24, 2008, 05:49 AM

sungsam2
WELCOME to TFL!!!

You would probably get a lot more information if you open your own thread with this qustion.

Is your bullet cast or plated or jacketed??? This will make a lot of difference.

There isn''t a lot of data on 160 gr bullets. Hodgdon, the distribut of HS-6 does not list a 160gr bullet but does list a

155gr XTP HS-6, Start load-8.8gr Max Load-11.0gr

another reference lists
165gr Jacketed HS-6, Start load-8.1gr Max Load-10.4gr

Again, Please list your bullet type. Including which weapon you are using it in would also be helpful.

jsflagstad · December 24, 2008, 08:38 AM

Depending on what you are going to do with it, I like the 135grn HP from Nosler for the 10mm and the 40S&W. Smokin velocity and real good acuracy...

JSF

sungsam2 · December 24, 2008, 02:53 PM

CMJ Swaged 10mm 160gr fp made by frontier it is plated...
I'm using a 10mm Colt Delta Elite.

thanks for the reply i hope you could tell me more with this info... i've just started reloading and still tryin to get a feel for it.

zxcvbob · December 24, 2008, 02:57 PM

Quote:

This may be an old discussion but.. Has anyone had experience trimming 10mm to use in a 40sw? I've been finding a lot of 10mm brass at the range lately. Thanks

Trade it 1:2 for .40SW brass with some poor 10mm shooter who needs it.

.40 brass is common. 10mm, not so much.

December 22, 2008, 11:06 PM	#1
Marineinthewoods Junior Member Join Date: December 22, 2008 Posts: 8	10mm to 40sw This may be an old discussion but.. Has anyone had experience trimming 10mm to use in a 40sw? I've been finding a lot of 10mm brass at the range lately. Thanks

December 23, 2008, 12:39 AM	#4
Shoney Senior Member Join Date: February 21, 2002 Location: Transplanted from Montana Posts: 2,311	Marineinthewoods WELCOME to TFL! The web area of the 10mm is thicker than on a 40S&W. If you load a trimmed 10mm case to a max 40S&W load, you will be over pressure or worse yet spike a higher pressure, because of the reduce case volume. Loading mid range 40's should be fine. __________________ I pledge allegiance to the Flag - - -, and to the Republic for which it stands….Our Forefathers were brilliant for giving us a Republic, not a democracy! Do you know the difference??? and WHY?http://www.wallbuilders.com/LIBissue...les.asp?id=111

December 23, 2008, 04:15 AM	#7
DWARREN123 Senior Member Join Date: January 22, 2006 Location: BETWEEN TN & KY Posts: 1,758	Trade or sell it for 40 S&W brass. __________________ Have a nice day!

December 23, 2008, 05:21 AM	#8
CowTowner Senior Member Join Date: October 17, 2007 Location: Cowtown of course! Posts: 1,747	Did he say 10mm brass? I'd be happy to discuss a trade of 40 S&W brass for 10mm brass. PM me, please. __________________ NRA Chief Range Safety Officer, Home Firearms Safety, Pistol and Rifle Instructor *“Today, we need a nation of Minutemen, citizens who are not only prepared to take arms, but citizens who regard the preservation of freedom as the basic purpose of their daily life......”* President John F. Kennedy

December 23, 2008, 01:33 PM	#10
jsflagstad Senior Member Join Date: January 29, 2005 Location: Up Nort Posts: 419	I asked the same question a couple of years back. What I was told is that the web area is thicker and teh "Internal Ballistics" would be different due to that. So trade it, it's worth more anyway. JSF __________________ JSF "Is your rifle interesting? -Larry Potterfield

December 23, 2008, 12:14 AM	#2
aaalaska Senior Member Join Date: March 14, 2007 Location: Palmer Ak Posts: 319	probably trade that a lot easier. Alex

December 23, 2008, 12:25 AM	#3
David Wile Senior Member Join Date: June 14, 2001 Location: Mechanicsburg, PA Posts: 585	Hey Marine, One can certainly trim 10MM cases to 40S&W cases, but like Alaska suggested, it would probably be less hassle to simply trade them with someone. Best wishes, Dave Wile

December 23, 2008, 01:03 AM	#5
English Bob Junior Member Join Date: March 9, 2006 Location: Arizona Posts: 11	The .40 was develpoed by shortening the 10mm, but they decided to switch to a small pistol primer for the .40. The problem arose from chambering the smaller 9mm size platforms for the .40. If I recall, when using the large primer the ejector could contact the primer when clearing the chamber of a live round. Hence the switch to the small primer. If you trim 10mm cases you will have to use large pistol primers. Something to think about. Trimming is no fun anyways.

December 23, 2008, 04:12 AM	#6
BurkGlocker Senior Member Join Date: May 18, 2008 Location: Sheppard AFB, TX Posts: 568	Like the others have said, you could probably trade the 10mm for .40s or better yet sell the 10mm brass. You can always tell the 10mm shooters at the range that reload because they are the ones on their hands and knees searching for the ejected brass...

December 23, 2008, 01:15 PM	#9
Foxbat Senior Member Join Date: January 13, 2008 Posts: 367	I will gladly swap your 10mm brass for .40's. Send me an email.

December 23, 2008, 03:00 PM	#11
Shoney Senior Member Join Date: February 21, 2002 Location: Transplanted from Montana Posts: 2,311	NO! NO! NO! Do not send it to those other guys. It is dangerous to possess. Send it to mme, and I will loa----ahhh---errrrr-- dispose of it for you! Gee! I am feeling so good today I won't even charge you a disposal fee. __________________ I pledge allegiance to the Flag - - -, and to the Republic for which it stands….Our Forefathers were brilliant for giving us a Republic, not a democracy! Do you know the difference??? and WHY?http://www.wallbuilders.com/LIBissue...les.asp?id=111

December 23, 2008, 04:56 PM	#13
Marineinthewoods Junior Member Join Date: December 22, 2008 Posts: 8	Thanks for the input, I'll give the trade some thought, don't really need anymore 40sw though. The 10mm to 40 is more of a curiosity on my part. Now if you want to trade some lake city 556 brass for it...

December 23, 2008, 08:46 PM	#14
sungsam2 Junior Member Join Date: December 23, 2008 Location: Petawawa, ON Posts: 2	10mm load data Can anyone tell me what a safe load would be for 160gr 10mm using HS6 powder? .. i've tried 10 grs already feels like a .22... i've been waiting to shoot my delta elite for a year!!

December 24, 2008, 05:49 AM	#15
Shoney Senior Member Join Date: February 21, 2002 Location: Transplanted from Montana Posts: 2,311	sungsam2 WELCOME to TFL!!! You would probably get a lot more information if you open your own thread with this qustion. Is your bullet cast or plated or jacketed??? This will make a lot of difference. There isn''t a lot of data on 160 gr bullets. Hodgdon, the distribut of HS-6 does not list a 160gr bullet but does list a 155gr XTP HS-6, Start load-8.8gr Max Load-11.0gr another reference lists 165gr Jacketed HS-6, Start load-8.1gr Max Load-10.4gr Again, Please list your bullet type. Including which weapon you are using it in would also be helpful. __________________ I pledge allegiance to the Flag - - -, and to the Republic for which it stands….Our Forefathers were brilliant for giving us a Republic, not a democracy! Do you know the difference??? and WHY?http://www.wallbuilders.com/LIBissue...les.asp?id=111

December 24, 2008, 08:38 AM	#16
jsflagstad Senior Member Join Date: January 29, 2005 Location: Up Nort Posts: 419	Depending on what you are going to do with it, I like the 135grn HP from Nosler for the 10mm and the 40S&W. Smokin velocity and real good acuracy... JSF __________________ JSF "Is your rifle interesting? -Larry Potterfield

December 24, 2008, 02:53 PM	#17
sungsam2 Junior Member Join Date: December 23, 2008 Location: Petawawa, ON Posts: 2	10mm load data CMJ Swaged 10mm 160gr fp made by frontier it is plated... I'm using a 10mm Colt Delta Elite. thanks for the reply i hope you could tell me more with this info... i've just started reloading and still tryin to get a feel for it.

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