155 swc .40 s&w

[Oldtimer]

Anyone have a good load for a 155 SWC in .40 S&W using Clays powder. I'm thinking about 3.4-3.5 gr. Cant find any data anywhere. A friend gave me box of 500 boolits. I use Clays in my .45 ACP all the time, because it is so clean. Thanks. Bob

[Jumping Frog]

I also use Clays in my .45 loads, but prefer to use a slower powder for .40 S&W. The pressures are enough higher in the .40, and pressures can peak very quickly with faster powders. Seat a bullet too deeply in a .40 with a fast powder and you could get pressures you aren't wanting to get.

[Oldtimer]

Well--- what would be a good powder to use? Just started loading for this caliber. I know it can be a little fineky. Got a jug of Unique, but this stuff is the king of dirty. What's everyone use for cast? Bob

[Shiloh]

Unique or AA #5 is what I use.

Shiloh

[Oldtimer]

Thanks Shiloh. I'll try it. I've probably used a dump truck Unique in .38 spl over the years. What do you recommend for a .40 155 cast swc? Thanks, Bob

[chris in va]

This may be of no help, but my Lyman manual lists a 150gr #2 alloy lead truncated cone with AA#2 being the 'best' in the lineup. Min 5.0gr @ 1041fps, max 6.4gr 1192fps.

[Tn_River_Ratt]

I use Win 231 in my .40. Check the Lee load book for the data.

[Shiloh]

6.3 gr AA#5 cycles just fine. Same with 5.2 gr of Unique. Both are quite accurate and both are at the low end of starting load data. THIS IS MY LOAD. It may work different for you. Check loading data.

This is with a LEE 175 gr TLSWC mold with the bevel base machined off to the middle of the next band.

Weighs 158 gr.

IMHO, the .40 S&W performs better with lighter boolits. At least mine does.

Shiloh

[Oldtimer]

Thanks all. I'll try some of these numbers. Had a box of 500 155gr swc given to me. Thought I'd try and work up some low power plinkers for my Glock. (I know, I know). Dont want anything even near the max load. Thanks again for the info. Bob