Velocity Deviations. 308

[hvychev77]

Hi everyone. I did some load testing for my .308 this weekend and have a couple questions for you long range shooters. I was using my chrono and had speeds from 2950-2925. Is this a normal spread? I guess I shot 5 rounds through it with chrono 10 feet from muzzle. Also, at 500-600 yards, how would these deviations affect point of impact? I weigh each charge of H4895 (41 grains) and am using a Hornady 168 grain Amax and CCI primer. Each charge is weighed on rcbs 505 scale. I plan on having a rcbs chargemaster before Christmas. Any advice or are these normal differences? Thanks

 

[rcairflr]

I would say there is no way you are getting 2950 fps with a .308 and 168 grain bullet. You may want to try moving your chrono a few more feet away from the muzzle and try again. With that load, you should be getting closer to 2500 fps.

 

[hvychev77]

Yes, you are correct. that was a mistake in my typing (dang phone). I meant to say the deviations are from 2590 - 2625 sorry about that...........So, is that normal?

 

[rcairflr]

Yes, you are correct. that was a mistake in my typing (dang phone). I meant to say the deviations are from 2590 - 2625 sorry about that...........So, is that normal?

That is not bad at all and should have very little to no impact to accuracy.