I finally ran through all my new Hornady brass and started to brass prep. What I noticed is I have a lot of bullet runout compared to shooting new brass.. I am using:
Redding Bushing S dies with .287 bushing with expander
Redding Competition seater die.
123 Scenars
I havent trimmed the brass yet and I am about to try .288 sized bushing next.
What I did notice that The new brass are measured at .286 and a loaded round measure .288-289. When I use the .287 bushing the necks are reduced to .286 and has a lot of tension through the expander when I pull the round out. I also noticed a huge velocity change as well...I need to reduce upto .4mils from orginal dope at 600 yards.
So i dont know what the problems is...too tight of a bushing that reduces the neck too much in one step(there is no neck only sizing dies out) or die issues....i have stripped em both down and examined everything and cleaned it as well...
BTW...the brass necks are pretty round and undamaged through my rifle..I padded the the ejection ramp but get pretty dented in my wifes rifle even though its padded as well. But conditions still have significatn runout......but not every loaded round is bad though
any thoughts?
Redding Bushing S dies with .287 bushing with expander
Redding Competition seater die.
123 Scenars
I havent trimmed the brass yet and I am about to try .288 sized bushing next.
What I did notice that The new brass are measured at .286 and a loaded round measure .288-289. When I use the .287 bushing the necks are reduced to .286 and has a lot of tension through the expander when I pull the round out. I also noticed a huge velocity change as well...I need to reduce upto .4mils from orginal dope at 600 yards.
So i dont know what the problems is...too tight of a bushing that reduces the neck too much in one step(there is no neck only sizing dies out) or die issues....i have stripped em both down and examined everything and cleaned it as well...
BTW...the brass necks are pretty round and undamaged through my rifle..I padded the the ejection ramp but get pretty dented in my wifes rifle even though its padded as well. But conditions still have significatn runout......but not every loaded round is bad though
any thoughts?
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