I have a 742 in 30-06 been shooting since the early 70's was used when I got it , keep chamber clean keep lightly oiled , has always ran fine , still shooting it , and so are my brothers with their model 742 and my dad with his model 740.
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I have a 742 in 30-06 been shooting since the early 70's was used when I got it , keep chamber clean keep lightly oiled , has always ran fine , still shooting it , and so are my brothers with their model 742 and my dad with his model 740.
We bought my dad a 742 30-06 for Christmas many years ago. I have it now. I thought about cleaning it and hunting with it, but it's like made of lead it's so heavy.
I have a 742 Carbine in 30/06 that has functioned flawlessly since the 80's with good factory ammo. I treat the receiver lugs with synthetic amsoil 2 cycle oil, and boresnake clean the chamber and barrel. It shoots best with the old Round Nose Core-lokt 180 gr ammo , so I hoard that for it whenever i find it at gun shows. This rifle took my first Grizzly right between the eyes, My first Moose, my first Caribou, and my first Black Bear until I graduated to 300 win mag.
Rich
Perhaps the action is starting its cycle while the pressure is still high enough to keep the case tight against the chamber. Heckler & Koch semi automatic rifles, including my 22WRM, has longitudinal fluted chambers to reduce the inside pressure on the front half of the case. Both 30-06 and .270 uses quite slow powders. Maybe using reloaded ammo with a slightly faster powder would alleviate the problem.
Been playin with reduced 3031 charges. Gonna continue to tweak on it. It's gonna get a complete tear down clean and polish also.
I witnessed a 742 that was in very good condition self distruc one afternoon. A freind bought one from a man that didn't shoot it a lot, well it blew the rim off the first shot,and tried to feed another round into the chamber that still had the shell stuck in it, talk about mangled! Funny thing is the gunsmith removed both rounds, and cleaned the chamber and it's still going strong. So every time I seen one at a bargain price, I recall that exciting afternoon many years ago!
I once had a very good gunsmith friend of mine from Bryant Ar. who is no longer with us tell me when I asked what gun he recommended when I wanted to buy a .270 semi-auto. His answer was "You only have 2 choices, The Remington or a Browning! He looked me in the eye and said Rick I wouldn't give you fifty cents for a railroad car Full of Remington's. That was when Browning's were starting to be assembled in Japan. I finally found a new Belgium made .270 and bought it. After that EVERY Remington that came in the shop, he would make me work on it!! I probably worked on 100 Remington's for every 2 Browning's. I sure LOVE my Browning BAR .270!
This has been my experience, too.
I've seen this on several guns. I can't remember the calibers, but I believe they were .30-06 and .270 Win.
I peen the burs in the rails down with a punch and then carefully dress them with a stone. This helps a lot, but it's a temporary fix. Over time the bolt will chew up the receiver again.
I've replaced the extractors before and polished rusty chambers. This cured the failures to extract that the OP has described. Someone mentioned that these guns are notorious for rusty chambers. That seems to be my experience as well. Maybe because it's harder to reach the chamber when compared to a bolt gun?
I don't know what you guys are using to remove the nut that holds the barrel on. I ground down a open end wrench to fit between the action bars. It works, but if there is a better tool/way, I am all ears.
(Edit: Lots of magazine related feeding problems, too.)
Yes, although rust in the chamber is a very valid point (and may still bear some responsibility, so it is worth checking out), I thought you would have mentioned brass damage.
All I know of the extraction system of the 742 is from the Numrich Gunparts schematic. It has a rather spidery-looking extractor, an extractor spring, and an ejector. Any of these might be defective, but I think quite slight wear or deformation of the extractor is the most likely. Slightly undercutting the edge with one of the cutting discs which come with the Dremel tool might do the trick.
http://www.gunpartscorp.com/Manufact...567.htm?page=1
http://i160.photobucket.com/albums/t...psjgk0r5as.jpg
I don't know if these are still available but it works. Another thing with these guns is the gas port, the little tube gets beat up and slowly closes. I guess they still are available.
http://www.brownells.com/gunsmith-to...-prod8872.aspx
WOW! My advice would be to get rid of it. I paid $300 for mine & sold it for $200. They don't call them "Jam-O-Matics" for nothing!
DRSLYR
So a 742 has the Remington inside-the-bolt-face ring type extractor? I once had a similar failure with a Remington 700 bolt gun. Bolt came back, cartridge case stayed in, no marks on the rim, but no extraction.
Turned out, when the ring type extractor retracted into the recess around the bolt face -- which it has to do as it slips over the case rim -- it got stuck in that "open" position, glued to the outside of the bolt face recess by old sticky oil. My bad.
I forget how I got it clean. Maybe spray carburetor cleaner? Anyhow, that fixed the problem, and I'm more careful with cleaning & oiling Remington bolts now. 8-)
I don't remember just what wrench I used to take the barrel off the 742 I had for about two weeks. I think it was one from a set of Walmart Popular Mechanics wenches that had, that or an eight inch Crescent wrench; either way, I know I didn't modify anything.Quote:
I don't know what you guys are using to remove the nut that holds the barrel on. I ground down a open end wrench to fit between the action bars. It works, but if there is a better tool/way, I am all ears.
Robert
Then you would have bent stuff, just saying.
That rifle has a life of 500-700 rounds at best. However the normal hunter/shooter will die before getting there as 40 rounds a year would be way above average. I made 60-70 bucks every year on each brought into the shop to be cleaned and tested, they were sweet money makers.
Here in NH they are popular with hunters but when sold to a shop $100 bucks only as most won't work and that is why they get traded. For a sporting rifle in Semi-Auto I have to recommended the Browning only. Winchesters semi's are even worse IMHO.
20 years with a shop but that's MHO. Yes I sold new ones, when the customer wants something he gets it. I like to feed my family.