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Old September 11, 2011, 09:53 AM   #1
UpNort Sticker
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Jammed round after firing in model 70

I have a model 70 7MM WSM, when I fire off a round I have to literally pound on the bolt to get it to eject the fired casing. When you put a live round in, you can run the bolt and eject it just fine. I tried Winchester and Federal shells with the same result. I bought this at an auction and I have a feeling that whoever had it prior (stated only 10 rounds had been fired through it), must have shot something through it other then a 7MM WSM.

I'm assuming I need a new barrell, is there anything else that could cause this???

Any help is greatly apprecaited.
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Old September 11, 2011, 10:09 AM   #2
hooligan1
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Don't try to fire it again, as it needs to be looked at by a Smith. There is some problem with the chamber. Are you able to put pics on this, so we can go from there. Wrong ammo,, maybe rough chamber, as this is not typical of a Mod #70. Post some pics of the ejected brass also and the ammo box, and the barrel stamp!!!
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Old September 12, 2011, 04:02 PM   #3
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mod 70 jammed round

are you using factory ammo or handloads?
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Old September 13, 2011, 08:36 PM   #4
243winxb
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Would be nice to know the serial number range of the rifles in this post. Same make, caliber. http://www.thehighroad.org/showthread.php?t=578328
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Old September 14, 2011, 04:10 AM   #5
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Check the fired brass next to a loaded one. Does it have any obvious differences ?
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Old September 14, 2011, 11:12 AM   #6
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Sounds like your chamber could use a good polishing for starters .
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Old September 14, 2011, 11:31 AM   #7
Doyle
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You could also have a headspace issue (as in not enough).
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Old September 14, 2011, 11:34 AM   #8
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Quote:
are you using factory ammo or handloads?
Inquiring minds want to know.
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Old September 17, 2011, 11:38 AM   #9
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Using factory loads, Federal TSX and Winchester accubonds.

Serial # G2554841. My family has over 30 Winchester Model 70's, never experienced anything like this before.

Need a cleaning!!?!? I think not, plus I can run a live round thru it and the bolt runs like butter.
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Old September 17, 2011, 07:15 PM   #10
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Not to be insulting, but are you absolutely sure about the caliber of the gun vs. the ammo being chambered? Reason I ask is because I had one in a while back, Rem 700, 7mm mag, that the customer complained wouldn't fire. Nothing mechanically wrong, sent it back, customer had same complaint, told him to send it back with his ammo. Turns out he was trying to shoot 7x57 Mauser in it. Goatwhiskers the Elder

Edit: 7mm mag and 7mmWSM are not the same, haven't been out to the shop to measure either one, but thought it might be a possibility. Goat
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Old September 17, 2011, 09:38 PM   #11
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Quote:
Edit: 7mm mag and 7mmWSM are not the same, haven't been out to the shop to measure either one, but thought it might be a possibility. Goat
The 7mm WSM is too large in diameter to chamber in the 7mm Rem mag, and the 7mm Rem mag is too long to chamber in the WSM.


Do the ejected cases have any scratches on them?
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Old September 17, 2011, 09:41 PM   #12
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Quote:
Federal TSX and Winchester accubonds.
What bullet weight?

Mehbee....... throated for light bullets and you are using heavy (long) ones?
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Old September 18, 2011, 01:02 AM   #13
dunerjeff
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I don't think they would throat a rifle for only a certain bullet weight range.Sounds alot like something is to tight to begin with(Tight ,tight chamber)and quite possibly rough(from a dull ream,will also cause tight chamber).When the round is fired,the brass expands and is tight to the walls.I would have it scoped and measured first and go from there.Too short a headspace could cause an excessive pressure situation also.Does the fired brass h/s area show any signs of high pressure?
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Old September 18, 2011, 09:30 AM   #14
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160 gr bullets

The casing has scratches, from mid-casing down. Looks like it's bulged also, wish I had a caliper but it appears to be bulged.

It's the corrrect shells.

I plan on taking it to a smith and having it cheecked out.
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Old September 18, 2011, 08:55 PM   #15
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I'm still leaning towards a chamber problem - either it isn't smooth or it isn't headspaced enough. Either way, I think you are smart to visit the gunsmith.
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Old September 20, 2011, 12:05 AM   #16
hoghunting
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If the cases have scratches, you probably have rough spots or burrs in the chamber. You will get some case bulging with any of the WSMs, but without pics or measurements, can't tell if it is excessive.
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Old September 24, 2011, 09:16 AM   #17
Harry Bonar
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mod. 70

Sir;
No, No, I don't think you need a new barrel!
I think you have a lightly rusted chamber from storage or carrying your rounds in a sweaty pocket!
Take a BRASS rod ad use some fine steel wool with your dril and clean out that chamber and I think you'll be fine!
Your barrel, if it is badly rusted may need to be removed and polished in a lathe but I don't think so!
Harry B.
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Old September 24, 2011, 10:40 PM   #18
modgodcom
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Bulge in brass=FUBAR chamber

IF THERE ARE ANY BULGES IN THE BRASS, YOU NEED A NEW CHAMBER.

Bottom line. Probably better off with a new barrel. Do not fire the weapon again, the lugs on your bolt could also be shot, might need a new bolt as well. Check for any signs of stress or cracks on your lugs and for any contact marks on the safety lug. At the very minimum,get the gun to a competent smith ASAP.
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