Over 6 years ago, I stumbled into a loading set of tools for a Stevens-Pope rifle #1661.  I tried to locate the rifle, but it had disappeared.  Recently, I was alerted that it was coming up for auction, but unfortunately, it had been altered from it's original condition.  I did put in a bid and won it, so was finally able to connect the tools with the gun.  Unfortunately, the original 38-72 32" barrel had been cut down to 30 3/4" and was rechambered for 38-50 Remington.  The action was a different one than cataloged by Tom Rowe in 2002.  The wood was still original, but had the buttstock checkered.  Still a nice rifle, even though altered.  I don't understand why someone would have done these modifications to this gun. 

The barrel sled for a machine rest is included and is the type that screws into the bottom of the barrel.   

I did find out that the caliber is actually a 39 caliber.  the bore is .384 with a pin gauge.  I haven't done a chamber cast yet to figure out the groove diameter.  The original bullets that I have taper from .380 at the front to .395 at the base.  Unfortunately, the original 39 caliber bullet mold was not in the set of tools that I picked up.  Would love to find one, but chances are better at winning the lottery.   
Bruce

Cutting the barrel down is fairly common on old Pope false muzzle barrels if the false muzzle disappeared at some time. I've seen more than one that was shortened enough to remove the holes at the muzzle on a Pope barreled rifle.

Yours is indeed still a nice rifle, and at least the Pope bore didn't get relined or rebored!

Damn shame. Several years ag I bought an old Peterson Ballard in 22LR. 28" #5 round barrel. Shot good. A couple of years later Gary Quinlan had an Ballard 22 with a Jersey City Pope barrel on an engraved #6 action. The barrel had originally been on a prone gun it appeaared. I traded Gary the Peterson Ballard towards the Pope Ballard. Down the road I saw the palm rest off of the Peterson on Ebay cheap enough so I bought it and messaged the seller that it appeared that he had my old Peterson Ballard. He didn't want to talk about it. He said "I just have the wood". Down the road Gary calls me one day and says he is going to tell me a story that I don't want to hear. He says that he ran into the chap that he had sold the Peterson Ballard to at a gun show and the fellow told him that the gun was too heavy so he had lopped the barrel off to 24" Gary said the fellow could tell by Gary's reaction that he had said the wrong thing. Fast forward a couple years the buttstock off of the gun came up for sale on Ebay and one of the ASSRA forum members bought it and put it on a gun he was putting together. Trying to understand what goes through some people's minds is like trying to understand what's going on inside of a cat's mind. That's a beautiful rifle that you have and it's a damn shame that someone decided to "improve" it. 

I plan on doing a chamber cast in the near future.  I'll update it then. 
Bruce

I got the chamber cast done.  Surprising results to me at least.  There are 10 grooves with a left hand twist.  The lands are narrow at .025" and the grooves are .110.  The bore/groove diameter at the breech end are .384/.394.  There is some taper to the groove such that at the muzzle, the diameters are .384/.391.

I also see that the chamber is basically a 38-50 Remington Hepburn, but the front end of the chamber is at .403", which is .011" over standard chamber size.  Based on this, I am guessing the owner that cut-off and rechambered the gun tried to make it for fixed ammunition, since he didn't have the false muzzle and starter.  The problem with this is that it doesn't leave a lot of room for case wall thickness.  It's an interesting piece.
Bruce 

Bruce,  I owned that rifle about 20 years ago, I bought it from Gary Quinlan. At that time the tools were with it, the barrel was still 32” long. It was a single trigger. The stock was broken badly thru the wrist and repaired, so someone possibly checkered it to cover the break. About 5 years later I had Gary sell it for me, he sold to a man named Bill Cobb, not sure where it went after that.