Hobby, I cannot speak to minis but my Hawken .50 loves 90 grains of swiss, .015 patch, and a RB. I site at 50 and it gives me a 1" group. Obviously you will need to play around with the load to find the sweet one. Muzzys are just like any other rifle if your are looking for accuracy. You need to spend time at the range developing a load that works best for your gun.
Follow Jimsdad & Stikbow recommendations
Follow Jimsdad & Stikbow recommendations