I am hoping that someone here who has a Lyman 12 gauge Foster Slug mold, and who casts in it, can provide me with the actual cast slug outside diameter?
I know that they claim it is .705", but after casting in Ideal and Lyman molds for close to 60 years - what they say isn't always the actually is.
To explain . . . years ago, I had a .69 cal. rifled musket (Civil War) that had the barrel reamed post Civil War to be used as a shotgun. I had a fellow give me some 12 gauge slugs cast in a Lyman Foster design and they shot very well out of it. I sold the gun a number of years ago. I now have another .69 caliber rifled musket that is an over size bore based on a .69 cal. Mine Ball cast in a Ideal mold I have. A .69 caliber minie is a huge piece of lead and if I could get a Foster slug to work - may have to size it down - they would be cast out of soft lead - it might be an ideal boolit to do short range plinking with - so just need to know what diameter they truly drop at if someone could measure done they have cast with a micrometer or a digital caliper.
I am having issues with getting a good bore measurement on the barrel, but it appears it might be a .001 over .700 or thereabouts. It might work to size a slug if it is close and then use a short stater to introduce the slug into the bore and then seat with the ramrod. Any help on the measurement would be greatly appreciated. Thanks!
Jim