You and Junebug are correct.
Mine is .45 cal as well as a tack driver. I was getting 2.5-3" groups at 50 yards using a patched ball and 35gr of 777. I'm just not real convinced that 127gr ball has what it takes at 50, so I'm limiting myself to 40 yards. After I Kill one, I'll make my decision base on ball performance. I've been taking along my Scout as a backup plan, but haven't brought myself to use it yet - I've had plenty opportunities with it. I may go ahead and smoke one with it tomorrow if the chance arises. My vacation is coming to an end and I haven't got one yet.