I'll never understand why Remington stopped making this choke. Too many arms/ammo manufacturers will stumble up on a good design for a product, and it will work significantly better than previous examples. At that point, the manufacturer will promptly begin production of a newer design and stop production of the good one that is working fine, like this choke.
My limited patterning with it before Win Lonbeard came out (just plain lead Win 12 ga, 3"), produced VERY even groups up to low 100s with lead #6.