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Redding Comp seater runout?

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09 April 2009, 06:21
elmerdeer
Redding Comp seater runout?
I have a RCBS Rockchucker supreme press and my runout on my 7mag is very good between .0005-002" I use lee collet necksizer and a Redding comp seater with nosler brass and 160grs accubonds. So now my problem, I also have the exact same setup for my 280AI using the same dies and brass, and the bullets are 140 accubonds, so why do I get runout of 0035"-009" out of my setup for the 280 AI? I have tried using an O-ring under the seater and it got a little better around 003" to 005" but that is not what I like. I am also waiting for my gunsmith to ream my Forster comp seater with the reamer used for my chamber and then I can compare if it gets better. But aside from that why is the 7mag get much less runout than my 280AI?
Thanks
Elmer
09 April 2009, 06:28
woods
Have you checked for do-nuts? My 280AI develops them.


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09 April 2009, 06:35
elmerdeer
quote:
Originally posted by woods:
Have you checked for do-nuts? My 280AI develops them.
Nope have not but I will after I get to the range this week.
Thanks
Elmer
09 April 2009, 07:03
SR4759
Have you check the run out of FL sized rounds?
09 April 2009, 07:39
elmerdeer
quote:
Originally posted by SR4759:
Have you check the run out of FL sized rounds?
Have not FL sized any rounds yet asthis will be only the 2nd firing of the brass this week, but I will try some to see if it helps.
Thanks
Elmer