Originally Posted by azsugarbear
I just found out that I was drawn for a depredation hunt for the Bison heard on the North Kaibab Plateau. The tag will be good for any cow or yearling. I haven't decided whether I will ultimately use my bow or my custom muzzleloader. Because of the Condor's presence at the Grand Canyon, I will need to shoot lead-free bullets. I have settled on the 325 grain Barnes 54 cal. Expander MZ bullet. Does anyone have any load data for starting or most accurate load? I suspect 90 to 120 grains??? The stores in my area are out of stock on the Barnes loading manual.
BTW: the rifle is a custom .54 caliber side lock percussion with a 34" Green Mountain barrel and a 1:28 twist.
Your in the ballpark on loading the expander with 90 to 120grs . what you will find as you start
working up your load that accuracy will start falling off near the top end.
My 54 cal likes the 110gr load and the 50cal likes 95grs. when I use 777 I find they like the same
powder charge by volume even though it is faster.
Expansion is very good and as long as you don't extended the distance to far they are deadly.
So start with 90grs and work up (Cleaning after each 3 shot group) and you will see where accuracy drops off.
I use them and they work really well for me.
J E CUSTOM