Retay barrels and choke fit issues. Explanation. One other thing I did not mention in the video is some people will ask well why does the factory choke fit and the aftermarket chokes does not… That’s because they make them sloppy loose to absorb the tolerance issues so they don’t have to deal with the problem, but the problem is when you make a choke tube loose, you have dangerous situations where if it loosens you could peel a choke and bulge a barrel and also it leaves too much clearance so when you shove big steel shot through it or a heavy Tungsten Load, the choke tube will expand and swage the threads of the Choke into the barrel, and it will never come out.