That is a long way across that field. Not to sound like heel, but them spotter markers are a shoe in. Easy to spot, but it looks like they have some strings attached.

All joking aside, that is some impressive accuracy. And that scope must be pretty good to be that close with it set at 50 yards. You had mentioned it had good clarity and excellent glass. It sounds more and more interesting.

That Knight if it is an elk rifle, I think with practice, just extended your range when you hunt. The Lehigh or the Sierra would make an excellent load.