Oh my two sentences were back to back, and on different subjects – this can be a somewhat gassy can because it does a great job absorbing the sound from the blast - most flow through cans do a terrible job with noise suppression as that's the trade off. Limit the gas, or limit the sound. 300 subs ripping a few rounds, you won't run into as much of a problem as 5.56 when I compete and am ripping off 40 rounds in a 20 second run. My comment was more about - if you want this can to be more of a flow through design, the replaceable end caps make it so you can do that, as it becomes more of a thing basically companies are coming out with ported end caps (you'll lose some sound suppression but gain gas flowing out the front of the can rather than out your chamber back at you). You could do that for 300blk too, just depends if you're mag dumping or not.