Woah! I just learned that theres no way in heck I can use my brass (2x loaded) to load for my dad's or cousins rifles. The first time loaded brass works fine on all 3 rifles. After two loads NOT GONNA HAPPEN! So I swiched bolts(NO I DIDNT TRY TO FIRE!) just to check if it was a chamber issue. My bolt pushes re-sized brass easily into both rifles. Dads bolt would not push re-sized brass into my rifle with out ''reefing'' the bolt shut. I learned this today doing load development on dads rifle. So far dads and my rifles shoot sub 3/4 moa with two different loads. RL-19 and 140 Accubonds, and IMR-4831 and 150 SST's. My cousins shoots 1/2 moa with hand loads from another loader who just got married and moved to another state, and just under 1 moa with factory 150 Fed Fusions. I was asked to load for both rifles and seeing as how thier family members I said ok. Heres some C.O.A.L. comparisons. My Rifle 2.915 (.015 off the lands) Cousins Rifle 2.856 (.015 off the lands) Dads Rifle 2.840 (.015 off the lands) Thats .075 difference from dads to mine and .059 difference from mine to cousins, while dads and cousins are only .016! All three rifles shot sub moa with 62 gr of RL-19 and 140gr Nosler Accubonds. All three are Model 70 Winchesters. Mine and dads are featherweights, Cousins is a Coyote. Looks like theyre gonna have to buy thier own brass. Just one more thing, I F/L sized 20 more brass and re-checked. Same issue. So I cranked the dye down just a tic (very small tic) and dimpled the brass.(I only tried 3) still the same issue. Both mine and dads chambers accept brass easily with my bolt pushing it. Is there anything else I can try?