I have a Hi-Point 9mm carbine and enjoy shooting it a lot ... it's been totally reliable and I'm thinking about making it my home defense long gun, along with the 1911 I keep in my nightstand.
Here's my question ... since JHPs are designed to be fired from handguns, they (I believe) are made to expand at handgun velocities -- 800-1,000 FPS or slightly faster. I'm guessing that from a long barrel, those velocities will climb dramatically. Will JHPs be more or less effective from my carbine? Should I be planning on using FMJs with the carbine, given my concern for overpenetration with a solid bullet traveling at well over 1,000 FPS, or can I load JHPs and be confident they will work at the elevated speeds they'll be traveling from the longer carbine barrel?
Here's my question ... since JHPs are designed to be fired from handguns, they (I believe) are made to expand at handgun velocities -- 800-1,000 FPS or slightly faster. I'm guessing that from a long barrel, those velocities will climb dramatically. Will JHPs be more or less effective from my carbine? Should I be planning on using FMJs with the carbine, given my concern for overpenetration with a solid bullet traveling at well over 1,000 FPS, or can I load JHPs and be confident they will work at the elevated speeds they'll be traveling from the longer carbine barrel?