I'm curious. How does it compare to mine?

Yah, the breechblock interference is the problem. Took the barrel out of the frame, and it's obvious that the rim recess in the chamber could accept a rim O.D. of as much as .345".  He built it for factory RF ammo, which is only .323 O.D.  He modified the lever to work with his new-made extractor, and that may be the trouble.  It may not be drawing the breechblock down far enough.

All in a day's work.  If I take his handmade extractor out, the breechblock drops down far enough, so it's something there that's the problem. Unfortunately in dismantling it I found that his home-made link is sloppy loose, so I'm going to have to correct that before I go any further.  That may have to wait until I can stand in front of the milling machine again.

So for further experimentation with the acorn blanks one of the other Favorites will have to be the test-bed, and this lovely little hybrid will go into the safe.

John Taylor just took this model 47 in 25 rimfire and made it a 25-20 single shot.
My friend had him do one in 25-20 wcf and it shoots the 257420 very well.
It's not a bad way to go.im out later today to see how it does.

ratseye wrote on Nov 6^th, 2021 at 8:03am:


I worked out a way to anneal live cases, by standing them in ice water and heating quickly and carefully so that no hot gas enters the case.   Another experimenter added the dodge of filling the case with Cream of Wheat to keep the hot gas away from the priming compound.  But even without that, I only set off about one or two in a hundred.   Still, the conversion is a lot of work, so I'm not planning to do any more.   

Just an FYI.

Most of the .25 Stevens centerfire cases I've made are from Winchester .22 Hornet and a few Hornady. The case mouths run around .005"  - they work great. But I had a few made from PPU .22 Hornet. The case mouth of these is about .010",.011". When seating the bullet in my shop made seater die, these thick mouth case can get jammed in the seater die and are difficult to chamber. I only had a few PPUs and have culled them out. It is something to keep in mind if you are making your own cases from .22 Hornet.
Steve

ndnchf wrote on Nov 7^th, 2021 at 4:45pm:


Good to know.  I bought some PPU Hornet cases a couple of months ago.  Haven't even opened the bags yet.  Maybe put those into the K-Hornet support stash and use the rest of the Winchester cases from there for the .25 Stevens project. 

Another thought: Do rounds made with the PPU brass fit into your guns' chambers?  As long as that .010 wall thickness is uniform, would it not center up the bullet in the throat better?

n.b. I've noticed that PPU brass for .223 Remington is also significantly heavier than American brass. 

With a .258" diameter bullet seated in the PPU case, it won't chamber unless I neck size the loaded round. But that makes the bullet undersize then. Neck reaming would solve the problem. But I only had 3 PPU cases, so I just set them aside for now.