Pros and Cons of Heavy/Light Bullets in a Pistol Calber Carbine

[Bubba Yugga]

I'm curious what experience there is with different bullet weights as fired out of Sub2K's, JR's, CX4's, etc.
For example, 9mm 115 vs 124 vs 147.
What effect and utility is there for each?
How does an 18.6" barrel influence the different masses intended for 4-5"?
Would a "subsonic" round still come out ridiculously over 1000 fps?

 

[gdrew]

Good question...which I'm in no position to answer but would also like to gain knowledge.

 

[brybenn]

It can add up to 200 fps in some cases

 

[MuthaFunk]

It can add up to 200 fps in some cases

This has been my experiences as well. I have a .45 ACP Hi-Point carbine. I saw on average a 175-200 fps jump on my +P hand loads.

 

[brybenn]

How do you like the hi point? I didn't buy one because of their status. I hear they run good

 

[Ganderite]

I have a Hi-Point in 9mm and in 40. Both run very well. I have used them in competitions.

As for the original question: Each gun is different. Buy a box of each bullet weight and see if your gun has a big favourite.

If you are shooting outdoors with no ear protection, I guess a subsonic round would be a bit quieter - but in a carbine I think it would be super sonic.

 

[Suputin]

You should not shoot subsonic rounds without hearing protection. The muzzle blast will still be well over the limit for hearing damage.

Flight noise makes no difference to the shooters ears.