If you aren't aware, the gauge for the C-lect can move. From what I remember, all you do is loosen the bead some, and you can slide the gauge forward and back. You can set the choke using calipers, and then move the gauge so that it corresponds with that choke.

 

I had no idea that you could do that. So basically you could move the "choke gauge" (assume you're referring to the silver plate with the choke deliniations/markings on it) back towards the receiver which should theoretically make the choke settings tighter?

 

Nice find!

 

Yes, the silver plate should move. I'm not familiar with what the bore of most Mossberg 20 gauges is. Let's say bore is .618". Full choke is a .040" constriction. So you would screw your choke in until your calipers say it is about .578". You would them move the plate so the line for full lines up with the back of the collar.

 

I fount a new 26 inch barrel with screw in chokes for mine. I bought it off ebay new for less than a 100.00.

 

I didn't think about that... so modern-production Mossy 500 barrels will fit vintage 1960's era guns?

 

Mine is around 1971. Yes the barrel worked just fine. Killed many of squirrels with the new barrel. Before u bid on one. Find one u like. Have the seller send u several pictures of the barrel. Have your barrel handy to compare to the pictures.

 

I seen several on ebay. But the prices has jumped up 65.00 or so. I seen a few 26 inch vent rib with modified choke. I seen 2 that was 22 inch barrels. They must have came off a youth model 20 ga. I wished mine was 22 inch sometimes turkey hunting.

 

Wow, that's a beauty.

 

The early 500's had nice walnut stocks, I had a 16 many years ago, my first pump shotgun.

 

I have an older 500 .410. There is actually a little feathering in the wood. Its a shame the new wood ones look like stamped particle board. Though I think it is better that the wood on the newer 870s that look like the wood is reconditioned 80 year old boat oar.