Shooting a known load yesterday to get on paper at 600. No problems.
Set up chrony (master beta...they need to change that name) and tested 42.8 grains of H4895 with Nosler Custom Comp 168 HPBT CCI Br2 Primer and Winchester case.
A few days ago I stopped the test at 42.7 grains with good results. Previous ladder test said 42.6 to 42.9 were all possible good loads.
Velocity on 42.6 was 2480 to 2500 (10 shots)
Velocity on 42.7 was 2486 to 2526 (10 shots)
Yes, ES sucks, thank you.
Temps were comparable on this 2nd range session. When I sent the 42.8 load, chony showed 3040!
So I loaded known good load of 41.5 (same components) which I used to get on paper and shot that just to see. It actually chrony'd faster at 3162 and 3140!
So after 3 rounds, I called it quits. Hits, btw, were in the 10 ring.
No pressure signs out of the ordinary seen on spent cases. No primers backed out. No piercings. Took the bolt apart and all appears well.
Read in chrony instructions that bright light may cause behaviour problems. It was very sunny yesterday. So might not having the cord stretched all the way and so may radio interference. I was listening to the wind report on local NOAA with portable radio prior to test, but radio was off, i think, during shooting.
I'll go back and try it again.
Any thoughts on this?
Set up chrony (master beta...they need to change that name) and tested 42.8 grains of H4895 with Nosler Custom Comp 168 HPBT CCI Br2 Primer and Winchester case.
A few days ago I stopped the test at 42.7 grains with good results. Previous ladder test said 42.6 to 42.9 were all possible good loads.
Velocity on 42.6 was 2480 to 2500 (10 shots)
Velocity on 42.7 was 2486 to 2526 (10 shots)
Yes, ES sucks, thank you.
Temps were comparable on this 2nd range session. When I sent the 42.8 load, chony showed 3040!
So I loaded known good load of 41.5 (same components) which I used to get on paper and shot that just to see. It actually chrony'd faster at 3162 and 3140!
So after 3 rounds, I called it quits. Hits, btw, were in the 10 ring.
No pressure signs out of the ordinary seen on spent cases. No primers backed out. No piercings. Took the bolt apart and all appears well.
Read in chrony instructions that bright light may cause behaviour problems. It was very sunny yesterday. So might not having the cord stretched all the way and so may radio interference. I was listening to the wind report on local NOAA with portable radio prior to test, but radio was off, i think, during shooting.
I'll go back and try it again.
Any thoughts on this?
