Powder selection is critical for reduced velocity loads in large cartridges. Reduced charges of the powders that you would normally use in .30-30 or .30-06 will not work; they burn too slow to generate enough pressure for consistent ignition. Faster powders do not fill the case, which can also cause ignition problems. Under some conditions, light charges of fast powders have resulted in bulged chambers.
The traditional powder for reduced velocity/lead bullet loads has been IMR's SR-4759. But in recent years IMR came out with Trail Boss which is MO BETTA. Trail Boss is the only powder I'd recommend for cast bullet loads in big rifle cartridges. It is a fast-burning but very bulky powder that works in just about any cartridge from .38 Special to .45-70. Hodgdon lists Trail Boss loads for 160 grain jacketed bullets in .30-30 and .30-06. These are close enough to your application that you should be able to use them as a starting point.
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Today's Featured Article - Field Modifications (Sins of the Farmer) - by Staff. Picture a new Chevrolet driving down the street without it's grill, right fender and trunk lid. Imagine a crude hole made in the hood to accommodate a new taller air cleaner, the fender wells cut away to make way for larger tires, and half of a sliding glass door used to replace the windshield. Top that off with an old set of '36 Ford headlight shells bolted to the hood. Pretty unlikely for a car... but for a tractor, this is pretty normal. It seems that more often than not they a
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