diggerj

I am also interested. Email is jdigioia2@cox.net and (401) 529-5317 . diggerj

I'd like to express again the appreciation I have for the members of this forum who go the extra mile to help JSAR owners. Many of those are in the thread above and many more chime in when they think a contribution can be made or a situation clarified. We all want to build and keep a knowledge base beyond what is in print on these ever-so-quickly diminishing number of rifles. BTW, when is the Joe Scott movie coming out? LOL John D.

Well, Joe Scott is the winner of the mystery round! I took down the high points on the entrance to give a better bevel and smoothed over with jeweler's rouge with my Dremel and it cycles like a new weapon. I also cleaned up the follower (not really necessary), and took apart the buffer to clean. I had not done the latter previously, and it really needed it internally. Also put a replacement extractor in. Firing 140 gr 7x57 rounds was a real pleasure. The replacement mainspring measures 11-3/4" now FYI. Going back to 30-06 barrel using 165 gr Winchester rounds really banged up the brass. Only able to retain a single spent shell (threw the others too far into the range!). That's for another day or a lower load. Once again, thank you Joe! Have you got a replacement spring for me? Diggerj

Gents: The one on EBay appears to m to be a reprint, save your money. Square corners and marked "1941" I don't believe is kosher. would like an original myself. diggerj

Well, still investigating. I think the rough edges I detected on the 7 mm may not be all that different from my 30-06. The rear collar on the 7mm is marked "6863K" with the letter larger font. It is 1.345" long overall length versus my 30-06 at 1.409 OL. From rear end of collar over the ramp to the chamber face on the 7mm seems to be 0.855" and for the 30-06 to be 0.865" - that ten thou extra room in the 30-06. I tried to measure seated rounds to the rear end of the collar but can't easily force a reproduce able seat... These dimensions above can't reflect the actual internal dimensions from inside edge of chamber lugs to chamber face accurately, but the 7 mm barrel locks down with correct headspace. Can't figure this out myself but something doesn't look right to me. Any insights out there? Maybe the heavier load round will work but I don't belong to a club, so I bring out the "closet queen" rarely and can't report that now. Maybe just have made a bad deal on this bbl. John

Lobo - the chambers have to accommodate the same bolt, so similar dimensioning should be safe. Joe - the sharp edges are at the interior surface of the chamber lug ridges and would most likely clean up easier by removing the collar. That is a little above (a lot above) my pay grade. I don't even have a real good vise to hold the barrel, never mind returning the collar to the origin point to retain head space. I am encouraged to get this done, so I'll figure it out. This board is super -- continued kudos to all. Jim, don't fail to underestimate the value of your effort. I'll report in when it is figured out. Many thanks and my best, John

Many thanks to all comments! I took tanker's suggestion and (with gross numbers output) pushed both barrels to the point of unlock against a bathroom scale. The no-problem 30-06 barrel took ~50 lbs and the problem 7 mm took 60 lbs. Took the bolt and examined fit and resistance to rotation in each barrel chamber and found a "sticking point on the 7 mm not present in the 30-06 barrel. Chamber previously examined showed no pitting, although the ring Joe described really can't be easily seen with a bore light or flashlight, I don't think it is the cause. When I draw my finger backward from the shoulder of the chamber out the rear, I can feel a very sharp edge on the lug ridges - which is the face of contact - as if the barrel was milled and never deburred. From the land nearest the ramp up to the opposite ridge on the 7 mm barrel is ~ .010" shorter than the 30-06 barrel. Almost like the barrel was never "finished off", and possibly never fired to work the sharp edges off! Does this seem like something a gunsmith with the proper equipment can fix by duplicating the 30-06 barrel dimensioning, or will a slow emery cloth rubbing by hand work? Ten thou is a lot of meat! again many thanks. Look forward to comments (from Joe especially with all his knowledge). Good call Tanker! diggerj aka John

Thanks Joe, glad to hear from you. I'll get the chance to try the brass exam next week and see what happens. Hard to find a high load round anywhere and I squirm at the prices online (shipping) for a single box. Guess I need that as a last measure. John D.

M... That was my first thought but couldn't find the ammo. Cabelas has a 173 gr round and I almost stopped yesterday going by Hartford from VT on 91. Too much traffic building, so I thought I'd inventory what I had first. I plan to go tomorrow. thanks and stay well. Diggerj

sorry guys for poor input on posting. I was in Art's country on our annual anniversary trip to Stowe and got lazy. I use the same everything else when I change out the barrels, so the return spring, recoil spring, etc. are not a variable. Only the barrel is and I don't refer to caliber variance, but whole barrel variance. I fired new Remington 140 gr 7x57 mm Mauser rounds. The very first attempt almost ejected but didn't have enough rearward force to fully eject and the spent shell got hung up. Subsequent rounds would not unlock the bolt lugs. I fired and manually ejected and reloaded without problem. Putting a micrometer on both barrels shows virtually no variation to three decimal places on either bushing or followers. I have a Joe Scott replacement 12" main spring, I know not NOS as it has an opposite twist to my original. My closer look this morning back home at the 7 mm barrel looks like the thing could have had a little sloppy parkerizing or touch up park on the rear bushing. I just took my Dremel and jeweler' rouge and polished all the high points. It seems slightly harder in resistance to my 30-06 barrel in force needed to push back and start the rotating as it hits the cam. but then again, it may have been worse before. I may have made a poor trade, but the rifling is super and maybe just not used enough to break in the barrel. The rifle is very clean always, and my 30-06 action is flawless. I normally use a lube oil, do you think a silicone grease or other if I can't get her to eject and load a round from the mag or does this sound like a poor machining and a gunsmith? Since Joe Scott is retired, that means SOL! Thanks for your responses. Diggerj aka John

Well, I will take my JSAR Out to a range soon (rare occasion for me) and will try to use my 7 mm barrel again. I stumbled on this in the archives and don't have enough savvy to know if this may be a cause - Original JSAR 7mm bbl for some reason are not as desirable as 30/06 and as such, do not bring near as much. $350-650 seems to be the going rate. Chilean originals have a Navy Arms import stamp on the underside. Replacements are without the import stamp and may or may not have proof marks. One of the California parts dealers had a large stock of replacement 7mm bbls several years ago. Remember, these are all converted Mauser bbls and are "stepped" rather than belled over the chamber. Anybody have input? Diggerj

To the posters with negative comments - Walt is probably too much of a gentleman to put you at the bottom of the requestor list. I'd do it in a heartbeat. Glad you're back in gear Walt! John D.

Only tried to fire it once in June with commercial Remington 7 x 57 140 grain ammo. Wouldn't cycle but fired fine manually. Any advice? John D. Aka diggerj.