shoots45s
Member
I tested some reloads for my .223 using a 55 gr soft point and CFE223 powder for their velocity.
I got an average speed of 2704 fps and std dev of 16.6 so the speed is consistent.
The load data for this powder says the speed for min and max charge (26.0 and 27.8 gr) is 3133 and 3329 using a 24" barrel.
Extrapolating, I should expect a speed around 3200 fps if using a 24" barrel. So I'm about 500 fps slow.
My barrel is 16" so I expect slower bullets, but at this site http://www.loadammo.com/Topics/October05.htm, indicates that for 223 to expect about 48 fps speed reduction for each 2" shorter barrel. That would account for about 300 fps.
Would the gas charging system account for the other 200 fps? If not. what other possibilities for the lower speeds?
Thanks
I got an average speed of 2704 fps and std dev of 16.6 so the speed is consistent.
The load data for this powder says the speed for min and max charge (26.0 and 27.8 gr) is 3133 and 3329 using a 24" barrel.
Extrapolating, I should expect a speed around 3200 fps if using a 24" barrel. So I'm about 500 fps slow.
My barrel is 16" so I expect slower bullets, but at this site http://www.loadammo.com/Topics/October05.htm, indicates that for 223 to expect about 48 fps speed reduction for each 2" shorter barrel. That would account for about 300 fps.
Would the gas charging system account for the other 200 fps? If not. what other possibilities for the lower speeds?
Thanks