After some time consuming tests with differnt reloading charges my 7mm rem mag has groups in the sub MOA. My problem is my cold bore shot is excellant, however the next 4 or 5 hit low. The grouping remains sub MOA however is lower than my cold bore shot. I use a silencer that I remove after every shot to let the barrel cool down since it is a sporter barrel. Time between shots is approx 3 to 5 minutes.. My bore is fouled, not clean.. I am not sure if I should be bedding this rifle or not.. Not sure if this would benefit me or distroy a very accurate rifle and ammo combination. Any suggestions would be greatly appreciated. Grant Example 300 Yards, cold bore bulls eye.. next 3 shots 1.5 inches low with a group of .75 inches.