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M70 feeding problems
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Gents:

A poster recommended I move my thread over here. I have a M70 Classic in 30 06 to be used as a project basis this winter. In the meantime, I will use it for my moose hunt next week. At the range the other day, I was practicing with one round in the magazine and one in the chamber. As I fired the first, I worked the bolt and dropped to one knee. However, when I pressed the trigger, all I got was a click. I cleared the rifle, put the safety on and looked around to find round number 2 in the dirt along with the fired cartridge from the first shot.

Any guesses on what happened?

Thanks!

Jeff
 
Posts: 2267 | Location: Maine | Registered: 03 May 2007Reply With Quote
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TRy duplicating the problem and watch to see how it happens.
 
Posts: 9207 | Registered: 22 November 2002Reply With Quote
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Picture of Mike_Dettorre
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Agree you should try and duplicate it...


On a CRF action the bolt face does no reach down and grab the cartridge, the cartridge when it releases from the rails pops up into the bolt face and under the extractor.

I suspect round number 2 may have popped up early and at a strange angle and missed engaging the extractor and the bolt may have simply pushed it off to the side and out on to the ground.

Remember Control Round Feeding is a misnomer. It really is Control Round Extraction.

With both a properly adjusted CRF or a PF, when the cartridge releases from the rails/magazine a good 1/3 or more of the cartridge is already past the opening of the ejection port and there is only one place for it to go (assuming you keep moving the bolt forward) and that is all the way into the chamber.

Even if you turn a push feed upside down, the cartridge can't fall out becuase the ejection port is too small at that point because the bolt has progressed forward.

The only "control" the CRF provides is that once the cartridge releases from the rails should you change your mind and pull the bolt backwards half way thru the bolt stroke is that the round will extract and eject in a positive fashion.


Mike

Legistine actu quod scripsi?

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.




What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10181 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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Picture of BaxterB
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floor plate opened up and dumped the round on your shoes
 
Posts: 7832 | Registered: 31 January 2005Reply With Quote
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Picture of ptaylor
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I've had the same problems with one of mine. 458ar on a ruger mk77. When I ran the bolt open very fast after firing it would spit the next live round out onto the ground. Tried three different followers, two different springs. I finally gave up and took it to a good smith, its there now and hopefully he can get it to work. Very frustrating. It would only do it when I ran the bolt really, really fast so duplicating the misfeed at home was difficult.
 
Posts: 328 | Location: central TX | Registered: 06 December 2005Reply With Quote
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