148 dewc in 357 mag

Clint Tickler · August 7, 2002, 03:23 PM

A freind of mine is just getting started in reloading and wonders about why he can't find any data for 148 gr dewc in 357. It's in the 38 spec section but not the magnum. He wants to use 357 cases and my advice was there should be no problem just taking the 38 data and applying it to the magnum cases. Right or wrong? Is the case volume difference a factor? Thanks.

Cheapo · August 7, 2002, 04:42 PM

Case volume being greater *can* lead to occasional poppers that don't quite get the bullet out, especially with longer barrels and minimum loads.

I'd start no lower than the middle of the load range, and chrono them. Anything giving similar speeds in the same barrel as the loading manual is quite unlikely to squib out on you...unless your friend wants to hot-rod the things...

stans · August 7, 2002, 06:25 PM

When I am trying to get 38 Special velocities with 357 Magnum cases, I just take the data for the 38 loads and add 0.5 grains. This usually gets me very close to matching 38 velocity.

braindead0 · August 7, 2002, 06:45 PM

I tend to start with 38+P loads. Found 3.2gr of Bullseye behind a 148gr HBWC works very nicely (600fps or so) for close range shooting.

ymmv, usual disclaimer...etc..

nyetter · August 8, 2002, 11:32 AM

If they still have any for sale, Midway's LoadMAP for .357 has wadcutter data. If you don't want to buy one I could post some data when I get home...

Sport45 · August 8, 2002, 02:37 PM

Titegroup Data Here is some data that includes 148gr HBWC in .357

Many of the powder manufactures have online load data.

Clint Tickler · August 8, 2002, 05:34 PM

Thanks for all the replies. I think I actually have a load map for 38/357 but forgot about it. I've moved and there is a LOT of stuff still in boxes.

August 7, 2002, 03:23 PM	#1
Clint Tickler Senior Member Join Date: August 12, 1999 Location: Seattle Area Posts: 184	148 dewc in 357 mag A freind of mine is just getting started in reloading and wonders about why he can't find any data for 148 gr dewc in 357. It's in the 38 spec section but not the magnum. He wants to use 357 cases and my advice was there should be no problem just taking the 38 data and applying it to the magnum cases. Right or wrong? Is the case volume difference a factor? Thanks.

August 7, 2002, 04:42 PM	#2
Cheapo Senior Member Join Date: November 19, 1998 Posts: 986	Case volume being greater can lead to occasional poppers that don't quite get the bullet out, especially with longer barrels and minimum loads. I'd start no lower than the middle of the load range, and chrono them. Anything giving similar speeds in the same barrel as the loading manual is quite unlikely to squib out on you...unless your friend wants to hot-rod the things... __________________ Let us never forget that the only legitimate source of government power is the citizens. If WE cannot exercise a certain power, we cannot grant it to the state.

August 7, 2002, 06:45 PM	#4
braindead0 Senior Member Join Date: February 28, 2002 Location: Canton, Oh Posts: 896	I tend to start with 38+P loads. Found 3.2gr of Bullseye behind a 148gr HBWC works very nicely (600fps or so) for close range shooting. ymmv, usual disclaimer...etc.. __________________ DoD# 2223 Meum scapha volitare plenum anguillae

August 8, 2002, 02:37 PM	#6
Sport45 Senior Member Join Date: May 25, 1999 Location: Too close to Houston Posts: 4,196	Titegroup Data Here is some data that includes 148gr HBWC in .357 Many of the powder manufactures have online load data. __________________ Proud member of the NRA and Texas State Rifle Association. Registered and active voter.

August 7, 2002, 06:25 PM	#3
stans Senior Member Join Date: November 9, 2001 Location: Virginia, USA Posts: 838	When I am trying to get 38 Special velocities with 357 Magnum cases, I just take the data for the 38 loads and add 0.5 grains. This usually gets me very close to matching 38 velocity.

August 8, 2002, 11:32 AM	#5
nyetter Senior Member Join Date: June 7, 2001 Location: Denver, CO Posts: 342	If they still have any for sale, Midway's LoadMAP for .357 has wadcutter data. If you don't want to buy one I could post some data when I get home...

August 8, 2002, 05:34 PM	#7
Clint Tickler Senior Member Join Date: August 12, 1999 Location: Seattle Area Posts: 184	Thanks for all the replies. I think I actually have a load map for 38/357 but forgot about it. I've moved and there is a LOT of stuff still in boxes.