Originally Posted by
wv109323
My experience has been that bullet size and hardness is everything. Mine handles jacketed bullets well. A hard cast commercial boolits at .430 will work but my cast boolits at .430 will not. With a proper boolit, my rifle shoots three- fourths inch group at 50 YARDS. My thoughts are the microgroove barrel needs a hard or copper bullet to grip the rifling at .429 or .430. My softer cast boolits at .430 will tumble and are inaccurate.
My rifle has microgroove barrel made in the 80s.
One problem is that my molds will not cast boolits above .430 and H&I sizing dies above .430 need to be special made. I have powder coated some boolits to get them to .432. I have not tried them yet. All this is boolits of 200 and 240 grains.