9mm is cheaper to shoot than just about any other cartridge, except maybe .22LR, but .22LR doesn't give you the recoil to deal with. That's good in some cases, but if you want to work on recoil control it's no good.
So I picked up a conversion barrel for my M&P 40 Pro from Speed Shooter Specialties to let me do some cheaper plinking and practicing. The barrel is made by KKM Precision and is button rifled and has a 1 in 20 twist.
With 9mm M&P magazines the conversion ran flawless for 150 rounds. With .40S&W mags I experienced 3 stoppages, however I found that if kept to 10 rounds or less of 9mm in the .40 S&W magazine it ran without failure.
Accuracy was spectacular. The KKM produced much tighter groups than the factory .40S&W barrel. I'm really considering getting one of their match .40S&W barrels now.
5 shots, 10 yards, offhand, Monarch Brass 115 gr 9mm FMJ
My reloads did just as well but shot 1-2" low. That's not surprising sense they are loaded to simulate +p self-defense ammo.
.40S&W vs 9mm
My .40S&W gamer load feels like it has about half the kick of the Monarch 9mm ammo, and feels a hell of a lot less than my hot 9mm loads. I had 2 friends with me and they felt a big difference too.
I have not shot a lot of .40S&W factory loads, and no self-defense loads out of this gun, but I would have to say the factory .40S&W loads are close to the factory 9mm. I would like to try a back to back comparison when I have both handy. As of now, I think the 9mm has more recoil than the .40S&W. Crazy.
So I picked up a conversion barrel for my M&P 40 Pro from Speed Shooter Specialties to let me do some cheaper plinking and practicing. The barrel is made by KKM Precision and is button rifled and has a 1 in 20 twist.
With 9mm M&P magazines the conversion ran flawless for 150 rounds. With .40S&W mags I experienced 3 stoppages, however I found that if kept to 10 rounds or less of 9mm in the .40 S&W magazine it ran without failure.
Accuracy was spectacular. The KKM produced much tighter groups than the factory .40S&W barrel. I'm really considering getting one of their match .40S&W barrels now.
My reloads did just as well but shot 1-2" low. That's not surprising sense they are loaded to simulate +p self-defense ammo.
.40S&W vs 9mm
My .40S&W gamer load feels like it has about half the kick of the Monarch 9mm ammo, and feels a hell of a lot less than my hot 9mm loads. I had 2 friends with me and they felt a big difference too.
I have not shot a lot of .40S&W factory loads, and no self-defense loads out of this gun, but I would have to say the factory .40S&W loads are close to the factory 9mm. I would like to try a back to back comparison when I have both handy. As of now, I think the 9mm has more recoil than the .40S&W. Crazy.
