45colt/454casull

[Hunter Customs]

There was one minor issue that id like to resolver...there was alot of unburnt powder in my cylinders and barrel. Wondering if i should drop the charge to 27.5 and us a SR magnum primer. Any suggestions to eliminate the unburnt powder issue? id consider a different powder but i have three pounds of imr4227 that i bought specifically for the cassul and s&w500 reloads.

Over the years I've used and still do a lot of IMR 4227, as a matter of fact I still have about 14 pounds on hand.
What you are seeing is what I've grown to consider normal with 4227, it's just the nature of the beast.
In my 45 Colt loads shooting a heavier bullet helped a little, but there's still some powder residue in the bore.

Best Regards
Bob Hunter