I bought a KIMBER MONTANA a while back in 270 wsm. Wondering if any of you have this gun and if so what factory ammo do you have the tightest groups with? Just looking to save a little time and money trying to figure it out. It will mainly be used for sheep, mule deer, antelope with the possibility of an elk on occasion. Looking to shoot 300-500 yards. So was thinking of using 130-140 for the deer sized game and 150 for elk. Was thinking the winchester accubond ct or xp3 but was leaning toward the accubond just because it makes a little bigger wound. Just trying to get an idea on where to start. Also would a Limbsaver Barrel De-resonater be a smart buy for this gun? worth the $20? Some say they work, just wondering.