doublegunshop.com - home Forums General Discussion Classic & Custom Single Barreled Sporting Rifles @ doublegunshop.com The last Martini?

Vall,
That is a unique system and the tapers must have taken a lot of skill to fit.

What are the steps for installing a barrel? Is there a gap between the adapter ring and the action when the barrel is snugged up?

There is probably an interesting thread that someone could start regarding the old takedown systems that forum members have in their possession. It seems that there was a demand for takedown systems and nearly every maker produced some rifles with one.

Dennis,
Pope's patent can be found at Google patents here:

https://patentimages.storage.googleapis.com/47/50/60/ed1a4398e7fe68/US384277.pdf

The fit is so good between the taper on the barrel shank and the adapter that fits into the receiver, that if I put the barrel into the receiver without that knurled collar it's very difficult to break the barrel free! I tried it only once and had to tap the chamber end with a brass punch to break the contact free of the two! There is no gap between the barrel and the receiver adapter when it's fully seated.

The procedure to install a barrel is to spin the knurled collar on the barrel, ensuring the end of the collar is behind enough the chamber end of the barrel is revealed. Then insert the barrel into the action and begin tightening the knurled collar onto the action. As it's hand tightened it will seat the barrel shank and the collar will bottom out against the action.
There's a small hole in the collar and a spanner wrench with it. But I've not used the spanner wrench, and I believe it's only there in case the collar is twisted on too tightly by someone, and the spanner would help break it free.
We counted the threads on the barrel, and on the adapter, and I believe they were about 21 tpi and 23 tpi each? We calculated the barrel is moved about .015" in or out depending on whether it's tightened or loosened. Just enough to draw it tight, or break the contact on the taper. There's also an alignment notch in each barrel to maintain vertical commonality between the 3 barrels.
It will perfectly zero each time, not matter which barrel is used, or how many times it's on or off. Just amazing workmanship, and engineering by Pope.

Just for fun, using Vall's numbers, it would take about four turns of the collar to seat the barrel. Probably some overlap.
Neat system. Looks similar to a Morse taper.
Chuck

My thoughts were the same Chuck. It does look like a typical Morse taper. Each half of the threaded sections is about 3/4" of threads, so it's quite a few turns to get the barrel seated or separated.

This work is up there with the best German gunmakers IMO.
I bought a Greener GP 12g shotgun in great condition last year and want to convert it to a rifle. This is now my benchmark.

The rifle is done.

Wow and double wow
Thank you for sharing
Mike

Looks great Dennis!

Thanks skeettx and Steve. The checkering was a timely distraction for the nearly constant quake aftershocks. We have had thousands and some big and we are 12 days down the road. We are a stone's throw from the epicenter. After a couple of days of lessened frequency we are back to fairly frequent 3+'s. On the positive side we haven't had a tornado, hurricane, flood, draught or wildfire recently!!

Oh and he checkers during aftershocks too

Glad your safe up there.
Steve