ORIGINAL: Mossie
A .452 Hornady xtp 250 grainerand a short black MMP sabot is a very accurate load for my 1/66 twist TC PA Hunter rifle and carbine. The sabot seals the bore better than the PA conical does. Probably has a higher BC. so it also holds up power wise at 100 yard deer as well. Try em!
I still prefer the roundballs but it's nice to know some other choices will work well.
I was wondering about the xtp's with my GPR. What was your powder charge?