The Firing Line Forums - View Single Post - Point of Impact Change with velocity change?

**Unclenick** · May 20, 2007, 10:17 PM

A slower bullet will be in the barrel longer, giving recoil more time to elevate the barrel. This will mean higher impact at shorter ranges, but the velocity loss will mean lower impact at longer ranges (more arcing trajectory). So there isn't any one answer. It will depend on range, the mass of the gun and the bullet and how tightly you are able to hold on to the gun. With this many variables, your best bet is to try it and see what you get? In my general experience, at ranges 25 yards and under, these variables only amount to an inch or so difference in POI. For a given weight, it is too little difference to matter in practical combat shooting, but enough to make a target shooter tweak his sight settings.

Nick

May 20, 2007, 10:17 PM	#9
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	A slower bullet will be in the barrel longer, giving recoil more time to elevate the barrel. This will mean higher impact at shorter ranges, but the velocity loss will mean lower impact at longer ranges (more arcing trajectory). So there isn't any one answer. It will depend on range, the mass of the gun and the bullet and how tightly you are able to hold on to the gun. With this many variables, your best bet is to try it and see what you get? In my general experience, at ranges 25 yards and under, these variables only amount to an inch or so difference in POI. For a given weight, it is too little difference to matter in practical combat shooting, but enough to make a target shooter tweak his sight settings. Nick __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle