I have a 45 Cal Kodiak and it took me over a year to find a decent load for it. Finally came up with 300 power belt platinum with 100 gr 777 and a 777 209 primer. It still doesn't group as good as I'd like for hunting. It also has a significant amount of "blow-back" out of the breech plug and after 10 shots or so there is a thin layer of carbon on the bottom of my scope. Anyone else have this issue? Breech plug is tight and action is closed all the way and it still happens. I'm going to go ahead and keep this and keep playing around with it.
I went ahead and purchased a T/C Omega 50 cal and the second time to the range I was putting the bullet through the same hole at 50 yards and grouping less than an inch at 100.