I have had the DA50 BMG for a few weeks now, and here's what I have so far:
DA50 upper, DA lower. Magpul butt. Leupold MK2 3-9 scope. Bipod is mounted backwards so it doesn't collapse under recoil. The bipod system works fine but it's probably at it's limit. When Mystic Precision has their Mpod bipod available again I'll probably get one. Our range is only 475 yards so no need for a bigger scope than the 3-9 right now. If I get a NR lower when they become available, I might put a more substantial scope on it. The Leupy was just sitting in my shop so it got called into service.
We've been whacking some gongs with it, but figured I should also shoot a group, so I set up a target at 200 yards and shot 3 rounds. First 2 shots were good but last one was a bit off. Usually when I feel the shot not going correctly, I stop before completing the trigger squeeze, but it was too late. Still landed within the group but I'm not sure if it would have resulted in vertical stringing had I done better.
Ammo was IMI 661gr bullet, also from Canada Ammo
Just over 1 1/2" at 200 yards, center to center. Next time I use the long range I'll probably put up some paper at 475 yards just because I'm curious of the results, and 200 isn't very far for a .50 BMG. One 3 shot group doesn't definitively mean anything, although I was pretty happy to see that this rifle should do MOA. Not bad for a (relatively) inexpensive rifle with relatively inexpensive ammo. Although to be honest this rifle is mostly just for my guests to ring some gongs and experience something completely extraordinary, and it's DAMN capable of that!!!