I think both rifles he listed are 1-28 twist but im not positive on the Huntsman. I know the early 58cals were a slower twist, if the Huntsman is a 1-48 i would try a round ball load for sure. Most of the lighter conicals like REALs should have no problem with either twist if loads are kept to moderate levels. T/Cs often have trouble with conicals if the QLA if off center.
A 50cal 1-28 can shoot round balls sometimes but loads will probably need to be 60gr or a little less.
