Drakejake
Member
If +P+ 9MM achieves 1300 fps out of a four inch pistol barrel, what can it be expected to do when shot from a Ruger carbine with a 16 inch barrel?
Thanks,
Drakejake
Thanks,
Drakejake
Velocity of 9MM from Rifle Barrel
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Coltdriver
Member
The 9mm is a high pressure cartridge that nearly immediately develops its full velocity. It may very well come out of a 16" long barrel slower!
Coltdriver
Member
Bibedo
You know you are probably right. With the +p+ there is probably enough additional powder to get a benefit.
Do you think you would gain velocity with a standard 9mm round??
You know you are probably right. With the +p+ there is probably enough additional powder to get a benefit.
Do you think you would gain velocity with a standard 9mm round??
grendelbane
Member
I don't have my notebook available right now, but when I compared my 9mm AR15 to my SIG p226 the 16" carbine barrel always gave a higher velocity.
If memory serves, the 115 grain bullets would usually pick up 200 fps from the carbine. 147 grain bullets did not enjoy as much of a boost, but since energy goes up by the square of the velocity, this is understandable.
My SIG is kind of slow, but my carbine will shoot everything at a higher velocity than I have ever seen from a conventional pistol. The highest velocity 9mm pistol I have ever clocked is a 5" Colt Gov't model. The AR-15 handily outperforms it. This seems to be the case with light, standard, and +p loads.
If memory serves, the 115 grain bullets would usually pick up 200 fps from the carbine. 147 grain bullets did not enjoy as much of a boost, but since energy goes up by the square of the velocity, this is understandable.
My SIG is kind of slow, but my carbine will shoot everything at a higher velocity than I have ever seen from a conventional pistol. The highest velocity 9mm pistol I have ever clocked is a 5" Colt Gov't model. The AR-15 handily outperforms it. This seems to be the case with light, standard, and +p loads.
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