My old O/U 12 and my Stevens 301 .410 have been polished and it helped the consistency and evenness of the patterns on both . My CZ 20 ga O/U has chrome lined barrels and is bad medicine with a Carlson extended Full. I run a bore snake through all of them after 2 shots . I've sent a lot of TSS through paper and found after two shots the pattern begins to lose consistency .

I used small pieces of medium - fine Scotch Brite with cutting oil spun by a drill.

I would suggest to anyone , before spending a bunch of $ testing chokes , polish the bore and try the chokes that came with the gun.

Here's the Stevens 301 .410 , polished bore , factory choke . The load is hand rolled by a local guy , it's a duplex of #8 over #9.5. A LOT of testing has gone into this load . The #8 shot stays concentrated in the center of the pattern.

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Last edited by 2Dogs; 07/17/26 03:56 PM.

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