The only (old) loads I have handy for my BLR (81) are for Sierra 150 Spitzer BT which I seated with COAL of 2.81 ...with 44.0 - 44.5 gr of IMR 4064. If I were loading today, I would use the same volumes of Varget.
For cold weather, my BLR needs to have all the lube washed out of the gear, bolt, hammer with WD-40...and operated “dry”.
EDIT: Mine is fine with regular FL sizing...chamber is not tight.
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Old Guys Rule
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