Powder for loading .40 S&W

[cmort666]

Originally posted by 240grJHP:
I have been using Bullseye for 165 and 180 grain bullets. The Alliant website has the weights of powder. I keep a little below their recommendations. Over a thousand rounds fired from a 4006 with no signs of pressure problems or failure to cycle. I agree their are better powders but this works for me.

+1

I load very little "hot" ammunition. Bullseye produces very accurate ammunition at very little cost because of the small charges. A pound of Bullseye lasts a LONG time.

 

[M29since14]

Drew - My M&P40 prefers HS-6 and Longshot. I suppose other powders might work if they were in that burning-rate range. My gun will consistently shoot high with the faster powders, like 231, for example. Better check to be sure yours doesn't do the same thing. Luckily enough, these two powders give the best accuracy too, but they are not exactly target loads.

I have not had any luck developing a slightly reduced load that shoots to POA-POI coincidence in my M&P40. Curiously, I do not have this problem with my P229. I have no idea why, but that is how it works, for me.

 

[jimbo-indy]

I like Longshot for the .40. It gives very good velocities with the heavier bullets yet listed pressures are low for the performance. My load is 7.5 gr. Longshot under a 180 gr. Rainier flat point (please verify w/ manuals, I'm going from memory) Crono'd at about 1050 from a High Power. Works great for pins. same l;oad did 1350 out of a CX-4 carbine. I just got a 610 and am looking forward to Longshot in the 10 mm. too. It looks good in the manuals when used with heavy bullets.

 

[magnum12pm]

I got to chime in here, I shoot the 135 grain berries for practice rounds 93.00 thousand including shipping. Just for practice the paper targets never complain about light bullet weight so far. I use 4.5 grains of Clays, they seem as far as muzzle report slightly less bang than commercial Blazzer brass 180 grn. I even enjoy shooting them just as much as any other 40 I tried