Originally Posted by jasent
If your velocity has flattened out and does not increase with charge increase it may just be that your gun with that combo is unable to burn more powder. Could be that the bullet is leaving the gun before all the powder is burned. So it can't get the higher speed or pressure you where watching out for. I'm surprised you did not break 3000 fps with it, I shoot 185gr Berger's at 3050 with no pressure signs. I see pressure at around 3100. my barrel is only half inch longer than yours
Hi there thanks for your replies. Yeah I thought I'd get to 3000 a fair bit easier.
Have noticed some of my cases that took the higher charges in load development 75.5gr are loose in the primer pocket.
What powder are you using and how many grains just out of curiosity?
Think maybe the baring surface of the Bergers is possibly a bit shorter than that of the Amax making the Amax slower??
Am happy loading at 74 now get really steady MV at 2947 average. Shot 3 three shot groups the other day at 510 yards the furtherest I've ever shot and the worst was 5 1/2"and the best 2" was just about 6" low so think my drop data might be a little out.
Thanks again guys