Model 70 explosion
- Thread starter Buckmastr
- Start date
Most likely explanation is some poor gunsmith work, receiver Was weakened, started to fail and eventually did.
Possibly from an over pressure handload. As yet unproven.
Ammunition factories are pretty careful about loading the right amount of the right powder.
Quality control is very carefully monitored.
I’d be doing what T905 said. Metallurgical exam, exam remaining rounds.
Truth will come out eventually
Possibly from an over pressure handload. As yet unproven.
Ammunition factories are pretty careful about loading the right amount of the right powder.
Quality control is very carefully monitored.
I’d be doing what T905 said. Metallurgical exam, exam remaining rounds.
Truth will come out eventually
patricksbb391
CGN Regular
- Location
- Ottawa & WMU 62
It is not a pre-64 as it lacks the claw extractor. I also checked my XTR-era M70, and it lacks the "belt" that appears to be machined into this bolt ahead of the locking lugs. Quite certain this is not an M70, but I have never handled an immediate post-1964 model (?!)
I think the belt you see is the groove for the claw extractor. Your push feed XTR M70s didn't have a claw extractor, so it doesn't have the recessed groove for a claw extractor.
- Location
- Western Manitoba
I do not know what Winchester calls the part, but if it was a Mauser, I believe the part being discussed in the last several posts is the extractor "collar" - it holds that long extractor to the bolt; the extractor reaches over that right side / bottom bolt lug to grab the case rim. The pre-64 one here has a groove ahead of the right/bottom bolt lug, but behind the bolt end, within which a tongue from the extractor rides, as well as the extractor nose that goes ahead of the bolt end. I do not have a post-64 push feed here but they had an extractor recessed into one of the bolt lugs, I think, and had no milling along the bolt body, either ahead or behind the bolt lugs - just going from memory on that last part...
A bolt from a pre-74 Win M70 (in 30-06), to show the front end of the bolt assembly:
A bolt from a pre-74 Win M70 (in 30-06), to show the front end of the bolt assembly:
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patricksbb391
CGN Regular
- Location
- Ottawa & WMU 62
Indeed, I misspoke. I realize what I am looking at now.....still, something very odd about this event/incident.
Regards All,
Patrick.
its weird how the bolt it sitting, i wonder if the gun chambered a round but it was ahead of the extractor like in front of the bolt being pushed, then when it didn't fire he hauled the bolt back, no case so he proceeds to load another and somehow the tip of the bullet hits the primer seting off the chambered round.
just a guess, not sure if that could even happen. also on the receiver where the bottom lug locks up looks blow own making it seem as if the bolt must have been in the lock position
just a guess, not sure if that could even happen. also on the receiver where the bottom lug locks up looks blow own making it seem as if the bolt must have been in the lock position
As others have said it is a pre-64 with the extractor blown off.
Another reason I'd say its a pre-64 is you can see the bolt handle (although somewhat difficult to make out) and it is smooth.
Post 64 and newer CRF actions have a knurled bolt handle where as the pre-64 is smooth.
That would be a pretty tough fit, trying to get a bullet that is 20 thou bigger into the chamber would be near impossible.
Ted
I’ve watched this thread on three forums. It’s the same dumb thread on all three forums.
fingers284
CGN Ultra frequent flyer
- Location
- Alberta Cowboy Ranges
I'm going to add another theory that might edge into the ridiculous realm to some.
This sort of aligns with Leepers observation that it appears that the bolt climbed on initial discharge. My observation of the photo leans me towards a "hang-fire" but damn that a lot of destruction for a blast that would have had an outlet.
It looks to me that the bolt handle and locking lug orientation would suggest that the bolt was in an unlocked orientation when blast occurred. My bolt lifting theory is supported by the shape of the one piece scope mount. it appears to have sustained a direct hit at the juncture of the front ring to scope base...could this upwards push to the bolt face, while being still slightly hooked underneath the front ring initiated the tear that removed the top of the ring and then hit the scope mount while still moving.
two other things indicate to me that the bolt was unlocked, the locking lugs of both the bolt & action are still intact that I can tell from the photo's and the case rim at the extractor appears to be torn away and this would indicate an unlocked bolt as well.
Just a "timeline of bolt travel" observation from the photos.
This sort of aligns with Leepers observation that it appears that the bolt climbed on initial discharge. My observation of the photo leans me towards a "hang-fire" but damn that a lot of destruction for a blast that would have had an outlet.
It looks to me that the bolt handle and locking lug orientation would suggest that the bolt was in an unlocked orientation when blast occurred. My bolt lifting theory is supported by the shape of the one piece scope mount. it appears to have sustained a direct hit at the juncture of the front ring to scope base...could this upwards push to the bolt face, while being still slightly hooked underneath the front ring initiated the tear that removed the top of the ring and then hit the scope mount while still moving.
two other things indicate to me that the bolt was unlocked, the locking lugs of both the bolt & action are still intact that I can tell from the photo's and the case rim at the extractor appears to be torn away and this would indicate an unlocked bolt as well.
Just a "timeline of bolt travel" observation from the photos.
