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750 cycling problem

Moderators: ripjack13, John A.


Copper BB
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Joined: Wed Dec 07, 2016 11:36 am
PostPosted: Sun Mar 11, 2018 9:18 am
When I fire my 750,308 cal, it will not load the next round into the chamber. Have to do it manually. Any ideas appreciated. Thank you.

20g
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PostPosted: Sun Mar 11, 2018 1:32 pm
Could be the magazine with bent lips. Other than that clean the living heck out of the chamber-bore area and try again. Got a Model Four from 1981 with no feeding or ejecting issues but mine does not get a lot of use honestly. Also am sure it could be an ammo issue. Are you shooting factory or reloads?
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PostPosted: Sun Mar 11, 2018 2:34 pm
^ This
When people ignorant of guns make gun laws, you end up with ignorant gun laws.
-Me

Copper BB
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PostPosted: Wed Mar 14, 2018 8:04 pm
mauser9 thank you for your reply. I have thoroughly cleaned the entire rifle with extra emphasis on the chamber. I bought a new magazine. Neither appears to have bent lips. I normally use Remington ammo in it but bought some Hornady and some Federal. Still won't load a new round after firing and ejecting a round. Baffled.
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PostPosted: Wed Mar 14, 2018 9:14 pm
I know that it can be difficult troubleshooting a gun, but can you tell what it's not doing? Other than not loading the next round.

I assume that it's extracting and ejecting OK. So I'm trying to figure out what it may be.

Is it short cycling? Is the hammer cocking upon firing? (I ask because if it's not cocking then it's likely short cycling). Gas port clogged?

Is the mag springs weak and not pushing up on the rounds enough/fast enough?
When people ignorant of guns make gun laws, you end up with ignorant gun laws.
-Me

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PostPosted: Fri Mar 16, 2018 8:51 am
I would think Remington would have this problem solved with the newer bolt and gas system on the 7400-750 guns. I read some had feeding issues with the 742 Model. Other than a good gunsmith I am baffled. Will Remington remedy the problem?
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PostPosted: Fri Mar 16, 2018 9:07 am
The old 740030-06 that I had worked really well.

But would rust if you looked at it.
When people ignorant of guns make gun laws, you end up with ignorant gun laws.
-Me

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PostPosted: Fri Mar 16, 2018 1:18 pm
John A. wrote:The old 740030-06 that I had worked really well.

But would rust if you looked at it.

Wow surprising to hear. Only ones I have heard complaints of rusting were the Remington sportsman series of the 870 which have that matte finish bluing on barrel and receiver. Something concerning the bluing salts maybe? Bought my Model Four back in 81 and so far so good but more rounds will tell. NIce gun but often wonder if the 7600 pump may have been a better choice.
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PostPosted: Fri Mar 16, 2018 1:39 pm
The 7400 that I had was bought ~2003.

Actually, I didn't even buy it. The company that I worked for had an inter-company competition to see who could do the most installs before the quarter was up because they were behind in their quota before the stockholder meeting trying to boost their customer count.

I got the gun and about $750 extra in commissions after taxes.

Seriously, after you hunted with it, you could physically see where your hand was carrying it around all day in a light brown rust on the receiver.

It was that bad.
When people ignorant of guns make gun laws, you end up with ignorant gun laws.
-Me
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.22LR
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PostPosted: Sun Feb 17, 2019 11:12 am
I'm having much the same issues with my Remington 7400 in .30-06. I'm almost positive it's the magazine. But this is what I am going to try do to prove it is the magazine, and not the gun.

I'll try to explain this, then you guys tell me what you think. I'm going to try to load and shoot it with the magazine completely out of the rifle. By manually pulling the bolt all the way to the rear. Then while holding the bolt fully rearward, loading a single round into the chamber. Then releasing the bolt from the far rearward position.

Then fire the rifle. If the bolt goes into battery on the live round after manually releasing it, then fires it and ejects the case clear of the weapon, then closes and goes into battery again on an empty chamber, it has to be the magazine. (The bolt cannot lock back without the magazine inserted in the weapon).

By doing this it will prove the rifle itself has done everything it is supposed to do. 1.) The bolt closed and went into battery on a live round, under it's own spring power. 2.) It then fired when the trigger was pulled. 3.) It the ejected the spent case. 4.) It then returned into battery on an empty chamber under it's own power.

If anything causes feeding or ejecting issues after the magazine is placed into the weapon, then it has to be the magazine.

All I would add is this is a 2 man job from a safety standpoint. One person behind the gun pulling back the bolt, releasing it, and shooting it. And a second person to load the live round through the ejection port. It is too hard to hold the bolt back, and fumble around trying to insert a live round at the same time. It would be clumsy and dangerous, because it would be too hard to do both and maintain safe control of the weapon. (The recoil spring has a lot of force to overcome with that little thumb operating lever).

But this method will prove if it's either the gun or the magazine that is the culprit. What say you?
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PostPosted: Sun Feb 17, 2019 11:20 am
Once upon a time, there was a company making 10+ round magazines for the 7400 and 7600 remingtons. I believe they were marked EAGLE, though it's been a long time since I had it and my recollection is pretty hazy. Perhaps you could track down one of them.

It's basically a long straight magazine, very similar to an M14 20 rounder.

Sorry, this is a really old picture that I scanned into the computer that was taken on 35mm film way before there were digital camera's, and it's the only photo that I could find of the gun and the magazine after I camo'd the gun.

Yes, that is also a speedfeed pistol grip Remington 870 stock on the rifle as well.

Yes, I was an ornery devil during the AWB. I stopped short of threading the barrel or adding a bayonet lug.

I used to refer to the gun as the "poor mans' BAR"

Image
When people ignorant of guns make gun laws, you end up with ignorant gun laws.
-Me

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PostPosted: Sun Feb 17, 2019 8:44 pm
Hey worth a try billt. My Model Four only came with one magazine or I would try a second to see if there was a malfunction. These were costly guns bought new in their day and should not come with headaches.

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