I organized a range clean up day at my local club (
great turnout) and afterward tried my AR15 MM upper to compare against the Bula M14. I had already planned to use the he-man rifle rather than the poo-say gun but was worth one more comparison...
After sighting in on another target, via prone 100 yds I easily popped the two x-ring hits. Pretty typical for this upper. The hits in the 8-ring, upper left, are awful hand. Seriously- WTH is going on? This upper has never drifted that much between sling and non-sling shooting. Usually I equally spray all 4 corners of the target when shooting offhand. Shot at ~8:30 outside the 10-ring was from aiming at 4:00 on the outer 9-ring. Guess I must have been slinging it up much tighter than in the past and when shooting offhand without the sling the shots are hitting high. Reason they are to the left is because I cock the rifle a little to the left in order to get a more stable hold.
Despite the potential x-ring jackpot with the AR15, I'll probably just shoot the Bula M14 in MM unless the visibility and/or my eyes suck, then I'll probably shoot better with the 4X scoped AR15 upper. I use the same lower for my Compass Lake service rifle upper.