Yes the choke is desinged for steel shot.
Problem is it does not want to pattern with smaller shot.
50% with no2 , 60% with BB , that make for pretty sparse patterns wich even a goose could fly thru.
I still have to try "BBB" and "T" shot thru it, who knows, might just work.
By the way, the other day I had time to kill so I took out my caliper and made some measurements.
Undertaker: bore=0.740 Muzzle=0.700
Remington factory modified: bore=0.735 Muzzle=0.710
Seems the Undertaker is playing the Browning "back bored"trick.
Also, compared to the Remington, the Undertaker would be very clos to a "full choke". Weird, no ?
Any ideas ?
Denis.