Depends on the bore. Unless yours is really tight, a .401 is no problem. Ive used upto a .406 in a Harvester 45x40 Crushib sabot and a .401 in the MMP tan. The MMP/Hornady tan is about 2 thousandths larger loaded OD than a Harvester sabot.
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Green Mountain 54-120
ULA Model 20 50cal 
Savage MLII SS Pacnor 45
Savage MLII SS/Laminate 50
Last edited by Gm54-120; 09-24-2011 at 06:36 AM.
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