I used to reload for a Marlin 1894 and a Colt clone SAA in .44-40, and more specifically with cast lead bullets by Beartooth (?). Both guns seemed to do okay with bullets that were sized .430 (both guns I "slugged" to establish they were both .429 across the lands). Never saw signs of pressure, but then I wasn't trying to create heavy loads--just cowboy loads. I read somewhere from a "gun guru" that when shooting cast bullets, they should be sized .001 over the bore diameter. Has anyone any experience with this? Any help will be greatly appreciated.