I'm trying to develop a load for 300 to 500 yard target shooting
using the 77 grain sierra's.So far the best I can get with any
powder is about 1.5 inch at 300 yds. How far are you guys letting
the bullet jump? I was trying .010 today..Powders used were
748,rx15,imr 4166,cfe 223 and H4895..Winchester brass and
cci 400 primers in a bolt actin from a rest on the bench.Thanjs for
any advice you have to offer..