Need load data: 170 gr. LSWC and 357 mag

jal5 · September 16, 2009, 03:27 PM

I have tried my 3 books: Hornady, Speer, and Lee plus the Hogdon pages with no luck on these . Can anyone point me in the right direction? Gun is a S&W M66 with 6" barrel, SS.

Thanks,

Joe

drail · September 16, 2009, 03:40 PM

Assuming that you are using hard cast lead SWC you should find data available for a 180 gr. load. Start about 10% below that and work up. It really doesn't matter if the data they give for a 180 gr. is for jacketed or cast. If you're talking swaged soft lead bullets you'll run into leading problems pretty quickly. A 180 gr. bullet in a .357 is a great load for a long pistol or a carbine/rifle. I have some 180 gr. loads I made some years back for a carbine that I'll see if I can dig up for you. What powder are you thinking of using? I think my loads were made with 2400.

jal5 · September 16, 2009, 08:23 PM

These are hard cast lead bullets.
I have titegroup, unique, and bullseye on hand. 2400 was recommended to me by another board member too...I would have to buy that and work up a load if that is the best powder recommendation.

Joe

September 16, 2009, 03:27 PM	#1
jal5 Senior Member Join Date: January 12, 2009 Location: NE Ohio Posts: 419	Need load data: 170 gr. LSWC and 357 mag I have tried my 3 books: Hornady, Speer, and Lee plus the Hogdon pages with no luck on these . Can anyone point me in the right direction? Gun is a S&W M66 with 6" barrel, SS. Thanks, Joe __________________ We live in the greatest country on Earth- always be thankful!

September 16, 2009, 08:23 PM	#3
jal5 Senior Member Join Date: January 12, 2009 Location: NE Ohio Posts: 419	These are hard cast lead bullets. I have titegroup, unique, and bullseye on hand. 2400 was recommended to me by another board member too...I would have to buy that and work up a load if that is the best powder recommendation. Joe __________________ We live in the greatest country on Earth- always be thankful!

September 16, 2009, 03:40 PM	#2
drail Junior member Join Date: February 2, 2008 Posts: 3,150	Assuming that you are using hard cast lead SWC you should find data available for a 180 gr. load. Start about 10% below that and work up. It really doesn't matter if the data they give for a 180 gr. is for jacketed or cast. If you're talking swaged soft lead bullets you'll run into leading problems pretty quickly. A 180 gr. bullet in a .357 is a great load for a long pistol or a carbine/rifle. I have some 180 gr. loads I made some years back for a carbine that I'll see if I can dig up for you. What powder are you thinking of using? I think my loads were made with 2400.