40 S&W, Light fast or heavey slow?

[355sigfan]

Drew no problem was not trying to be a jerk. Heavier bullets usually have more momentium in any given cartridge. The 40 is an exception. The 165 grain loads at 1150 have more momentium than 180 grain loads at 980. The 165 grain loads have a power factor of 190 while the 180 grain loads have a power factor of 176. Power factor is a momentium figure not a energy figure. Now in most other calibers the heaviest loads in the caliber have the highest power factor while the lighter loads have a higher kinetic energy level.
Pat

 

[George Hill]

I generally like the heavier loads in most calibers... but in .40 I like the 135 grain Cor-Bons. My USP absolutely loved them. Reliable and very accurate. Even though they are light, they still have good penetration which is the key... and they have great expansion which is just a bonus, but a good bonus to have when you can get it and the 135s get it a lot.

 

[355sigfan]

George you may want to re think your choice in the 135 grain Corbons they don't have good penetration like you think. They average about 10 inches in gelatin. They do terrible agianst most of the barriers in the FBI testing protical as well.
Pat

 

[BioDemon]

I think I'll go with the 155gr to 165gr bullet class. Thanks every one!