Do you have a .50 cal too along with every other gun you claim to own? Just curious, because if so, I'd love to see pics. How's that scope video coming along btw? For the MOA number, I simply quoted robar's site for the RC50. That was a 3 shot group with optimal ammo at 100 yards I believe and they guarantee it. You should buy one and take videos of it to see if it really is, supposing you don't already own a few. Since it's a gauranteed figure they should take the rifle back if you can't get that number. It would answer all questions here.
Also, why are you comparing calibers and not guns now? I could fit a .308 shell into a pipe and it wouldn't have very good accuracy. So can we compare apples to apples without tossing in the oranges when it suits us? Just let me know when and if we're talking about real life or in the game, ok?
Also, do you have a source, or sources, for the PSG-1 being primarily for Olympic shooting events? Which events? What countries have used it and during what years?
Optical mice are notorious for tracking issues, so they aren't excused from the grid effect by any means. Make a very quick movement left or right in Infiltration and tell me what happens. You'll either be staring at the ceiling or the floor most likely.
Out of curiosity, how are you firing the RC50 on RtK so that it takes 3 seconds to hit? Are you manually cycling the bolt? Are you holding down the fire key after the gun has fired so that it doesn't automatically load the next round? Those results sound pretty bad. Maybe you didn't set your netspeed or were lagging?
Oh, and as for me playing? I probably have a few thousand hours of 2.9 under my belt. Just so ya know.