Here is me shooting my original PU sniper at 900 yards. I've stretched it to 1000 yards but can't quite get consistent hits yet. I'm using handloads.
https://www.youtube.com/watch?v=yiML8V70830
I had the wrong velocity in my Sierra Infinity software. They're barely supersonic at 1000 yards. 1139 FPS according to my calculator and 1218 FPS at 900 yds.
I've got a sweet shooting Danish M1. I wanted it for a shooter, but without knowing who did the conversion, then it could have been a $1500 headache. Anyway my wife and I need to start saving more money to put towards grownup stuff. :p