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It may be a bad idea to shoot lead in an AR anyway.
The cast bullet loads shown are recommended for use in bolt action and single shot rifles. They will not function properly if used in gas operated rifles such as the AR-15. Gas operated rifles require a specific pressure level at the gas port in the barrel. The AR-15 port pressure is designed to be compatible with the slower burning powders used with military spec. jacketed bullet loads. It is very difficult to ever get the correct balance of necessary port pressure (and the resulting high velocity level) and acceptable accuracy with cast bullets in these rifles.
Lyman #311410. Came in either flat or bevel base. Made for the 31 M1 carbine.