243

[ann brezinski]

given a 80 to 100 grain bullet what do you feel would the velocity loss be over the 22 barrel if loads were shot in a 660 remington with thier 20 inch barrel

 

[Critter Picker]

Lots of variables, probably 50 to 75 FPS per inch.

 

[243winxb]

27" to 18" is 44fps loss per inch. Sierra #1530 85 gr hpbt. IMR 4350.

• 27-inch barrel: ~3100 fps
• 18-inch barrel: ~2700 fps

243 Winchester- Effect of barrel length on velocity

Based on the ubiquitous 308 Winchester, the 243 Winchester has developed a strong following among rifleman. The 243 Winchester’s 6mm (.243″) bullet offers reduced recoil and the abilit…

rifleshooter.com

 

[MagnumManiac]

Yep, I would agree 50fps per inch lost.

Only time I ever saw less than this was with a 22PPC, loss per inch averaged 24fps…

Cheers.

 

[Tiny Tim]

I think it may be a little less than others, probably 50-70fps loss for the two inches. Not enough to make a huge difference.

 

[snox801]

I'm driving the 75gr hammer hht at 3622fps out of a 22" so you would be around 3500fps with a 20" I would guess