243 winchester

[maddysdad]

going from a 22 in barrel to a 20 inch barrel how much velocity can you loose in general with 80 grain to the 100 grain bullets

 

[rwj]

Guesstimate 100 FPS…

 

[Bill Norris]

going from a 22 in barrel to a 20 inch barrel how much velocity can you loose in general with 80 grain to the 100 grain bullets

Probably at most 30 to 50 fps

 

[Capt. Oblivious]

I chopped one form 23 to 21 inches and both lengths shot a 95gr BT accurately at the same 2995fps at the end of the day, obviously the shorter barrel did it at a little higher pressure. Id also imagine around 30-50fps if you want to talk about speed "loss"