A new post on the Doublegun Singlebarrel forum features a Gallery Practice Rifle.

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Interesting, thanks for the heads-up.

Too bad there aren't more pictures - I'd say it might only be a GPR action, and could even be in some center-fire caliber (note that the trip pin has been removed). Certainly is not a Krag barrel. And, that is not a target-type scope base, either. Lotta questions there!

That barrel was the first thing I picked up on... 

There is another photo posted.  This one is of the breech with the bolt open. You can see the trip pin in this photo.

I posted a comment.  The early GPR in my gun safe has the extractor on the bottom half of the barrel face.  The photo posted appears to have the extractor on the top. 

I have only had my hands on an early GPR.  Where is the extractor plate on a later version?

The new photo shows what I believe to be the only version of the SA extractor plate design. As I understand it, the Pope design has the bore offset high and the extractor was not substantially (though claw may have required a bit of reshaping?) altered.

The plate design (what a Rube Goldberg nightmare!) has the bore offset low, with spring-plate pulled out by normal extractor. Interesting about the trip. The first picture shows a white spot, which I took to be an empty hole - guess it wasn't. Barrel is also interesting - having seen the interior shot, I'd have to guess that it was re-profiled as well as shortened - doubt very much that anyone would go the trouble of replicating the plate, etc. Was going to say that it could be restored - now, that's impossible.

Cannot tell if that is the special CCV cartouche. If it is, and if it were mine, I might consider offering the stock to a collector to be stretched, and then putting a nice classic sporter stock on the shortened .22, which is beyond saving so far as originality is concerned, but could be a knockout plinker.

I just checked the early GPR in my gun safe.  The extractor plate is on top.  We get forgetful when we get old.  You would think I would remember.  I've shot almost a thousand rounds through it.

What's special about the CCV cartouche?

Only those few GPRs fully assembled at SA have it. Most GPRs were sent out as barreled actions, and may be found in a variety of service stocks, including unmarked ones.

I don't believe the last picture is the same rifle as it shows a hand guard and 1902 rear sight mounted and no sign of the scope mounts.

Excellent point, Ned. There is something fishy going on there.

Reincarnated - do you belong to that forum? If so, how about attempting to get a clarification? Thanks.

The poster of that second pic stated that it isn't a pic of the gun in question, merely one that he posted to show the extractor system under discussion. He promises to post detailed pics of his gun when he receives it.

Ah yes, I didn't see that the thread had gone to a second page!! That clears things up a bit!!