Yeah, I'll research more, as I agree with you that I am taking a gamble at everything. Last game I played (last Saturday) was at gunman tuddenham, brilliant site, great marshals, fixed a problem with my gun's trigger jamming, due to I think the gears not tight enough (something like that) I understand buying a gun that is meant to be a DMR is better, but, I don't particularly want to invest in another stock weapon. Also just to clear up about this pain business, one point in the game, I was near someone not seen, and I walked up to him and said surrender, I could've shot him. But, I really am not about pain and all..
EDIT: Thanks prof, that image helped me understand. It makes sense, if I was to shoot someone with a bb that weighed a ton (example, not possible) it would hurt a lot, but with a 0.2g it doesn't hurt. At the game on Saturday, there was this sniper, he had about 450 FPS on his weapon, and I think was using 0.4s so his FPS was lower with 0.4s was lower, and he was told he could only engage at 20meters minimum, can't be closer. Which makes sense, shooting someone with a 0.4g bb @360 FPS or so from 5 meters would hurt a lot. I guess if I took the crono, and I used 0.3g bbs and got a reading of 350 FPS, I'd be told only to engage at minimum 20 meters. This would be fine. As the point was to make the m4 into more of a DMR.