Bob: I agree with ArtS 's comment regarding TULA chokes. Also, I have seen a bunch of older guns, including muzzleloaders have what is called a "Jug" choke put in them to change cyl to a tighter choke. The old-time turkey shoot/card meat shoot guys out here in the Southern Midwest did it on a regular basis with barrels having all kinds of choke in them. Some were threw such a tight pattern they would blow the card off the post.

Just some thoughts.

In the case of the choking in the left barrel I am assuming it was done to open the choke and produce a larger shot pattern? But, why the left barrel?
Bob Jurewicz

I've got a Remington FE-Grade Trap Gun that reportedly had belonged to an old Pennsylvania pigeon shooter and it has had the choke opened in the left barrel.

"Blowing the card off the post" ranks right up there with Tula chokes dominating International Skeet. Neither has any truth attached to it. Sorry guys.

Today I sent for a letter on this gun. I really don't expect that Parker did that left barrel choking-but you never know.
Bob Jurewicz

Bill: "Blowing the card off the post" was a general comment by the shooters. I did see it happen once and the card did blow off the post at the shot. It was shot to hell and back when it was presented at the score table. If memory serves this was in a little town deep in SE Missouri.

I cant say much about TULA chokes but they were a popular option from Hal DuPont in his Krieghoff skeet guns

Harry,
You did not read my post carefully enough. I said I was not steady and that accounts for the off center patterns.
Bob Jurewicz