chetmarks

The only place i would worry about the 300 grain XTP-Mag is with a close range shot... they are built a little tougher than the regular XTP - so they are slower to start expansion.

The 'shots' should shoot paper very well, actually they would probably do just as well as a regular XTP on whitetail also.

I do not think you will even come cloase to getting a Black Knight Sabot down a Triumph. They were/are built for the older and larger bore of the old Knight rifles. I am not sure you will get them down anything new other than a .504 White.