uberti '73 win using 454190. different powder amounts changing the amount of compression, all bullets go straight, no key holes, but accuracy sucks with bp, 777, pyrodex with almost exact results, appears to be lube to end of barrel. my smokeless load is 11gr, #5 with gc rnf. results in 1.5" groups @ 50 about as good as I can see.
anyway, is it possible the 454190 doesn't carry enough lube? would anyone invest in a "big lube" mold?