Quote Originally Posted by 220AI View Post
Mr F,

If I've understood your comments correctly, then I think it's a chrony issue.

You say your bullets are striking 1" higher, yet have lost 500 fps?? Something doesn't sound right.
1" higher would make sense with a lower velocity load if he was measuring the maximum ordinate.

In other words if he zeroed at 200 yards he would then expect something like 1" high at 100 yards. If he found that it was in fact 2" high at 100 yards on shooting the lower velocity is indicated.

weird one, losing 500fps seems almost impossible without maybe having used a much slower powder in the second set of loads.

Soot on the cases?