The original 870 WitPros were built by Jim Wilson with a modified Winchoke. There were three different contributors. Jim Wilson, Gene Thompson, and Lynn Jordall...who pushed for a 14.5" barrel, as opposed to the 12" Jim used. Jim ended up leaving the project, but Gene continued with the 12" with modified choke.
I have to wonder about the reasoning behind the tight chokes in these guns?
Me as well. For the very close range they are designed for would expect CB to be the way to go.
I figure that they wanted to increase the range where the shot strikes as one mass, for the sake of maximum terminal effectiveness, which is very short when you're talking about a time before Vang Comp, Flitecontrol wads or any of that.
And the expected decrease in accuracy of a pistol gripped SG vs a full stock.
Today I'd just go CB and use Fed. Flight control.
I like a bit of shot spread myself, but with old school buckshot out of a CB or IC choke, depending on your barrel and particular load, you might end up with comically huge patterns or inconsistently spaced ones, if not both, so a decent amount of choke might be beneficial.
your pattern at close range is more apt to be one tight column of shot . a search on the internet will confirm it. these are interesting guns and wouldn't you know our resident expert on these types has one with a removable choke no less. yeah i am jealous .nice gun Mcoy.Very cool. Never even heard of these guns. Would love to have one, but probably put a stock on it for non restricted classification.
I actually often wonder why more of these shotguns aren't made with tighter choked barrels. I just got an 870 with a 14" bbl (cylinder bore,) and wish it was at least improved cyliner or even modified choke. With such a short bbl, your pattern is likely going to be huge even at close range. I prefer a tighter pattern no matter what. Of course I can get it threaded for chokes, but would much rather it came stock with a tighter choke.