I got the resizing thing figured out, and the posting drill. I will get pictures of the fired brass up, but boy, real busy at home. New roof going on, two rooms getting new paint, mower deck tune-up. You know how goes....
yes , absolutely , the same ID there as here and everywhere else im a member , i have no aliases but this one ---oh , save for sass , there im watab kid , somewhat comical now that im near 70 but at the time i joined so many years ago it was reaching for that youth i still felt i had , too old to change things now ,
you use the same moniker there ? ill give you a shout out next time i visit , i come here daily if possible , i go there as often as i can but not quite as regular , i do love my rimfires --actually a larger collection than my enfields if you go by quantity and that includes my webleys and inglis and cooey [but thats a double entry along with my enfield trainers ,
i gave up my US rifle collection for the most part years ago save the trainers and a few converted with 22 cal that i love so it adds to the count a bit as well , ive kept a lot of my US handguns as well , so i think these days my enfields and rimfires are the majority of my holdings
Luna3 over on RFC. I seem to be attracting stray Mossbergs for some reason. In fact, bought another just yesterday from a younger guy who does painting for me. It was his grandfathers 251 C semi auto. Light rust outside, walnut stock in pretty nice condition, rear sight missing parts, and tinkered with to make it slam fire for some reason. But the bore is clean and bright...another project....
And so greetings from Leatherstocking country! I have to get those pictures up....
I've got a 320b that has a birch monte carlo stock that was stained to look walnut. Mossberg had the color down pat. You've got to look closely to tell it's not walnut.
Not so much colour, it was the grain. I had stripped it as it was in pretty tough shape (lots of scratches in the hard finish). I finished it with linseed oil and it took it well.
The question now is WHICH "FIELD" Gauge? (there are 2, one SAAMI & the other CIP.) You need to see if it passes an 0.074" one, if it does then Replace the bolt head with one that will bring it into spec.
Then fire a case & show a pic. That may be all the trouble is.
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The "After" case does look like it's deformed slightly (looks like the case head may no longer be 90 deg to the bore axis) but it may be a photo illusion. Will these fired cases chamber and extract in the rifle without excessive force to close/open the bolt?
The primers do look like they have backed out a little, can you take a photo from a side view and lay a straight edge on top. Some backing out is normal.
I've not tried this on a LE, but you may be able to get a feeler gage between the bolt head and case head on a new case and determine how excessive the headspace really is; don't force the bolt closed, just light pressure to get the bolt to lock on the right thickness gage.
Yes the SAAMI gauge is a 3 step gauge GO, No Go, & FIELD, the CIP only has pass/Fail, also the actual measurement is different.
Like BRITRIFLES & GOOSIC have mentioned the case rim & base looks tilted compared to the longitudinal axis.
As I think I mentioned earlier excessive headspace in a basically truncated cone shape will result in excessive sideways stretching as well.
I think you need someone else to check & if needed fix the headspace. Its not a terribly expensive process just replacing the bolt head & then measuring & testing.
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
The British military didn't care what the brass looked like after they were fired or if they could be reloaded, they cared about reliabilty in the field. Loose chambers were part of the plan, even if headspace was in spec. Remember me asking about your gunsmith? What did he use to check the head space with? Alot of so called Lee Enfield eggspurts will grab a .308/.243 no-go gauge and call it good. A decent .303 no-go headspace gauge will be set at .070". If the bolt closes on that,check the length of the bolt head and then start trying to locate one longer. The No1Mk111 type bolt heads were kinda matched to their respective rifle and if a headspace issue arose, the new bolt head was worked,(refacing the bolt face with a stone)until proper headspace was achieved and then installed onto the bolt and rifle. I have a no4mk1* Long Branch that produces fired cases identical to yours and my headspace is spot on.
Could be that the bolt got swapped around some time back and it now has excessive headspace. Does the bolt serial number match the receiver?
Changing out a bolt head is much cheaper and much easier than changing out a barrel. If you know someone that has some spare No. 1 bolt heads, I would try them out to see what brings it back in spec. Then go test fire and see if that solves the case deformation problem.
Also a slight possibility that the bolt head you have on the bolt is not machined square, not sure how that would happen, just a possibility.
I've fired thousands of rounds from my Long Branch No. 4 and it still headspaces the way it was set up when the barrel was installed by Fultons (other than the test firing by Fultons in the 1960's, I'm the only one who has shot this rifle).
I've never tried the "O-ring" method of holding the case back on the bolt head, I've never had to, but this might be another option to see if you can fire form the cases to headspace on the chamber shoulder. I think this would be my last resort if I couldn't get a different bolt head. But I would still want to know that the headspace is not larger than the 0.074 Field gage, if it is, probably should not be fired to be on the safe side; and besides, it would be very hard on the brass and may result in case ruptures on the first or second reload.
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