I have a Tikka T3 Varmint Synthetic in .223 and have a second .223 and a .308(Super Varmints) on order. All will have the same size barrels, all barrels will be 23.6 inches long and all will be stainless. I would like to get one sound moderator for use on all 3 rifles. I have been advised, by a member whose judgement I respect, that a .30 moderator would adequately reduce the sound of a .223. Should I go for an over-barrel type, thinking of balance and handling? I will have to get all 3 rifles threaded. Any thread preferences?