Mine does well with 40 BT bullets with IMR 4198. My barrel is 12 twist, so I'm trying 40 to 53 grain loads first, and powders I have in volume, so I don't find a load I only have a half pound of powder left, and have to buy more. Varget and 8208 seem like possible powders, but I've got a few more in enough volume to try after those.
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