using a savage 23B in 25-20
85 gr plain base / FN .......sized .257 and .258 ( accuracy same with either sizing)
8.6 gr of 2400
at 25 yds 8 shots in 3/4"x 3/4"
BUT
at 50 yds 8 shots in 4" x 4" !!!
no tumbling but a very wide spread..
opinions as to what is happening to the accuracy? I am thinking that this boolit is not getting enough velocity but could use some opinions