TH44

With great respect, stop there.

Bullets lodged in bores and the space filled with unburnt powder, is a single step away from a detonation in the bore, due to stalled and restarted ignition.

That is a lovely old gun, let alone the possible damage to yourself.

Hodgedon have recently posted a way of measuring "Trail Boss" for they say "Any" center fire cartridge. It may be worth a call to them if you are wanting to use smokeless propellant as they don't specifically say they are OK for NFB loads.

Failing that I would apply for the BP ticket. It is not much of a chore.

PS. A Caveat, I know it is an obsolete caliber, but do you have it on Sec 1 if you are shooting it, the authorities are getting pretty hot on this because of all the 577/450's out there.

Regards