I have a RMC 50 caliber flintlock with 1/28 twist and it shoots 300 grain Hornady xtp bullets great and 250 grain Hornady xtp not too bad (around 3" at 100) both with 90 to 100 grains of 2f. My question is this. It appears that it likes heavier bullets but was curious if anyone shoots 180-230 grain bullets out of their 1/28 twist rifle with good accuracy at 90-100 grains of 2f. I hate to buy a box of 100 and not have them group well. I also was interested in how good of groups they get when using 44 caliber bullets and sabots? (I have been using 300-250 grain .452 and short black mmp sabot) Are the 180-230 pistol bullets too light for deer? This rifle has a Green Mountian barrel so I think the Knight rifles have similar barrels although most probably don't use Black Powder with them.