Quote:
Originally Posted by Collo Rosso
Mine has ballard (conventional?) rifling. Factory ammo with jacketed bullets is very accurate at 100 yards. Hard cast SWC's at .430" are all over the place. .433" hard cast and the accuracy comes right back.
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FWIW; SAAMI recommendation for a .44 Magnum
rifle barrel is a groove diameter of .431".
Handgun groove diameter is suggested to be .429". Perhaps why the poor accuracy of your .430" bullets? Why the difference? I dunno...