Measure Twice, Cut a Check Once
My Rem. Turkey choke above has a .665 constriction, the same as Dead Dog chokes (which, again, like Dead Coyote are DESIGNED specifically for big shot including Buckshot to go long distances tightly), promises to put 85+% of a pattern in the traditional 30" circle (usually expected to get 70-75% at the optimal range) at 40 yards. Sure, Remington was probably thinking .18 diameter lead BB shot. But the Dead Coyote, which gets good reviews in practical use with buckshot, is .660, so, I'm stickin' with mine. Not only 'cause it isn't quite so tight but also becasue I'm cheap -- I already have it, it cost me $14 OTD at a gunshow, and 'cause I'll probably never need to use it...
The gun it is for (see below) currently wears a Modified choke Rem. tactical tube, and it'd be the rare, but possible, occassion when I'd feel compelled to switch choke tubes to reach out to 50 yards or beyond. Yes, I wanted the choice but a Modified choke should still easily have most of its shot within a 5-foot circle at 50 yards -- for what is basically now a tactical arm I can certainly live with that! Again, at that kind of distance and beyond, even big buckshot has lost so much of its energy that the multiple hits required to deliver enough energy to kill is pushing the envelope. That said, I do have "some" 3" Mag #1 Buckshot that I think would be interesting for that...
Al