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Old January 13, 2013, 11:06 AM   #22
Senior Member
Join Date: January 22, 2005
Location: Kentucky
Posts: 2,411
I'd suspect one of two problems....

Bullet lube build up in the seating stem area...I clean this out periodically with WD40 or brake cleaner.

Your cast bullet's ogive is varying. Cast bullets vary in length more than jacketed and this could be your problem. Tho it shouldn't change actual seating depth much if at all.

I find that jacketed bullets vary far less than the cast variety, but in reality, in my experience, it doesn't seem to matter much in my groups shot from rest. But you're experiencing upwards of .030"+ seems a bit much....

HTH's Rod
Cherish our flag, honor it, defend what it stands for or get the hell out. Our Freedoms are not free, they've been paid for many times over by heros in uniform. Far better men than I, died that we could be FREE.

USAF FAC, 5th Spl Forces, An Loc, lll Corps, RVN, 69-70, Vietnam Vet '69-'73
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