Better for super overgassed setup or 308 rigs - CMMG ZEROED .750in ID Adjustable Gas Block

I bought this for a friend's build that had a wilson combat intermediate gas barrel and wanted to refine it. Possible a combination of issues caused it where i had to make this wide open and even then, i couldn't get the bolt to lock back. I think some gas is venting in the block. Further more, when installing, it had a bur where it scratched up the gas journal section of the barrel. I think CMMG had someone else make this part for them and they skimped out on the quality control. I ended up putting this on my intermediate gas 308 and it works better on that.