I've just started using Trail Boss for my .45Colt cowboy loads,meaning wimp loads,lol.
funny thing is,even tho it's touted as being a 'low pressure' powder,my cases fired in the sixguns don't have NEAR the sooting or blackening I get with all other powders. for some reaon,the TB seals off the cases better in the chambers.
Less tumbling required,and prolly gain some accuracy with the round sealing better. win,win !
I'm shooting 200 grain cast boolist,over 5.4 grains TB,and life is good.