HR: UNSC Weapons - Bullets

Just discovered that bullet physics in Reach are "instant hit" like in Halo 2, instead of "real-time" like in Halo 3.  This means that you hit what you shoot instantly, the bullet takes zero time to travel to the target, regardless of (bullet-based) weapon or distance.  This is a big change for the DMR compared to the BR, where you used to have to lead targets at range.  I have updated the DMR, Magnum, and AR posts to reflect this change.  This is not a change for the sniper rifle, because that was instant-hit in Halo 3.  Obviously doesn't apply to weapons like rocket and grenade launchers, but should apply to the Needle Rifle.