Unknown Choke

[Mr. Mosin]

I have a Marlin M55 Goose Gun that a previous owner chopped the barrel on, remounted the factory bead (on a ramp), and had threaded for chokes. It looks to be professionally done; with one minor hiccup.... the choke has no branding on it. Just "Extra Full". No maker, no nada. How to tell what maker it is ? Will a thread gage from a run of the mill tap/die set help any ?

 

[Lefty38-55]

As somewhere to start, I'd take a good close-up photo (above a ruler) and post it here.

As I have 3 shotguns with different make choke tubes and visually they are all different, i.e., length overall, how far up (or down) the threads start/stop, length of collar (if any) above the threads towards the muzzle, etc.

 

[458MinMag]

I had a 20ga barrel threaded for chokes many years ago by Carlson's, and it takes Tru-Choke tubes. I believe this is a common threading for non-factory chokes. The Brownell's page lists some thread specs for reference. The thread gage from your tap and die set should have 32tpi, but not sure if it will have a 44tpi.
Brownell's 12ga Tru-Choke

 

[jmr40]

This company did a lot of conversions back in the day. I'd bet the odds are better than 50/50 it is theirs. You may be able to look at photos of their tubes to compare or even contact them.

Colonial Choke and Tool, LLC

THE MOST COMPLETE LINE OF SHOTGUN CHOKE TUBES, TOOLING & ACCESSORIES AVAILABLE TO THE SHOOTING INDUSTRY

www.colonialchokeandtool.com