I like the XTP also . I shot the 158s for a while I like the 140s they tended to group a little better in my security six than the 158s . Never had the chance to try them on a muley for real just a 5 pace "clean up" I wood say at 50-60yrds you could break the off sholder with some regularity . The doe I put down lost about a pound of neck roast . Knew a fellow in Utah that killed a buck and a doe at 75yrds shooting 158 kieth style swc's in the early 70's niether went over ten yrds .As I remember I only saw the buck till after the shot when the doehumped up behind she was hit hi enough that she was just getting out of the grass . I was like 8 .

#2 Always know whats beyond your target.