I have a M70 .300WM with one. It is a very accurate rifle. I installed the CR and never use the ported. One advantage, even for handloaders, is you can load to the velocity you want, and then tune the barrel. In the field the device helps protect the muzzle from dings if the rifle is placed muzzle to floor board in the truck or similar. However, if the rifle is leaning against something muzzle up, the big opening of the CR weight can "funnel" something in. I tape my muzzle in the field so this is not an issue. They are not pretty, but I do think the CR is the better looking of the two weights.
I'd try it. You may find it doesn't look so bad if it shoots itty-bitty groups. Who knows, someday the BOSS guns may bring a premium among collectors. Or maybe not. The collector market is funny.
