View Full Version : Boolit Sizing Micro Groove Barrel
GregLaROCHE
04-24-2018, 05:29 AM
Hello Everyone,
I’ve cast some 405gr boolits for my Marlin .45-70 Micro Groove barrel from the 1980’s. Should I size it to .458 or add .001?
Thanks
lotech
04-24-2018, 07:09 AM
I had one of the Marlin .45-70s from about the mid-'80s. Use the fattest bullet that will permit a loaded cartridge to chamber without difficulty. I think that was either .459" or .460" for my rifle.
Walter Laich
04-24-2018, 12:20 PM
lotech is right
you want it to be tight all the way around once it's fired
will reduce/eliminate leading too
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