The Firing Line Forums - View Single Post - 45-70 cast bullet keyholes.

Jim Watson · February 14, 2012, 09:52 AM

A .459" bullet is undersize for most Trapdoors.
Moyers says their .45-70s are BHN 13 but I suspect it is still antimonial lead.
You had been shooting jacketed bullets and probably still had some copper deposits.
All that and a rapid loss of accuracy adds up to a badly leaded bore. It is going to take a lot of cleaning and then proper loading.

There is a book on loading for the trapdoor by Pat and Spence Wolf. It would pay to read it.

February 14, 2012, 09:52 AM	#7
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,543	A .459" bullet is undersize for most Trapdoors. Moyers says their .45-70s are BHN 13 but I suspect it is still antimonial lead. You had been shooting jacketed bullets and probably still had some copper deposits. All that and a rapid loss of accuracy adds up to a badly leaded bore. It is going to take a lot of cleaning and then proper loading. There is a book on loading for the trapdoor by Pat and Spence Wolf. It would pay to read it.