Heavybullet,
In the event of any type of case or primer failure, hot gases and particles are going to travel down those wide open raceways. The Savage has a front baffle and a huge rear baffle to stop and deflect gas and works extremely well. The Rem has a complete ring around the case that is countersunk into the barrel which works very well, especially when there is a total failure of the case. Although the Rem shroud and bolt handle are very similar to the XL7, when bad things happen to the Rem, all gas must fit through the tiny space between the bolt ring and the barrel countersink. Same tiny space with the front baffle on the Savage, this has a tremendous dampening effect and acts as the first stage of potection so to speak. The XL7 has nothing but the small shroud which does not cover the left raceway opening competely. Gas flowing past the boltface of the XL7 is not slowed down at all and not entirely redirected on the left side either.