I think this is generally incorrect.
Originally Posted by csvt99
Different choke manufacturers make different claims.
I did read that pure Gold claims their ports strip wads.
Primos claims their ports vent gas to keep the gas from blowing a pattern and to reduce muzzle jump and felt recoil.
Pattern Master uses internal studs to grab the wad. They also port their tubes, presumably to vent off gas for whatever reason.
Most of the choke makers I have heard of claim to use porting to vent gas in order to reduce muzzle jump and reduce felt recoil.
Pure Gold is the only one I have read about that claims their porting strips wads. I don't doubt them one bit, it's just that most others do not make that claim.
mudhen - CA
"Lighten up Francis"