Never shot one that didn’t suck on the pattern board

 

Finally a post that saves me money instead of costing it. I’ll stick with my factory 725 chokes.

 

I really can’t recommend them. I have several, and unfortunately I’ll have to retire them. They tend to shred a piece of the wad upon exiting the barrel. I got hit in the cheek by a shooter next to me a few years ago, and yesterday the shooter to my right hollered ouch and said he got hit in the cheek. I immediately took it out and put my Browning choke back in. Rather expensive lesson. Thankfully the guy is my friend and didn't want to fight!

 

Once you reach the pinnacle of choke tube research, gimmicks are all that's left.
From the original Winchokes to Briley Helix just about every theory possible has been tried.
Nearly every time in real world pattern test long taper chokes without porting, shallow rifling, or any other gimmick preform the best.