700 264 Win Mag chambering issues......

[xswanted]

I've got a Rem 700 chambered in 264 Win Mag, factory rifle. The gun shoots very well, way better than what I was expecting from a factory rifle.

Anyhow, no matter what I do I get the following situation.

Full length sized brass or NS brass will go into the chamber and create a very hard bolt close, however if I lift the bolt up and pull it back slightly, then push it back the bolt will close with no issues.

If I work the action hard, like one would do in a hunting situation, the bolt will close freely and easily, but I have to slam it home with some authority.

I've tried sizing differently, I've tried just the case...no bullet, I've tried different seating depths. Lots of things.

Any ideas on this? I have an older 264 700 that has no problems with the brass I'm putting into the new one sized the same way.

Thanks

 

[2506]

Sounds like it could be one of these two things. Have you trimmed the cases? Trim them to 2.490".
It could be that you are not bumping the shoulder back enough in your sizing.
Also, are you cleaning the sizing lube off the cases well after sizing? Sounds like you have a tight chamber and that can be a good thing and a bad thing. Good because you can get higher velocity with lighter powder charges, be careful and start low and work up your loads. The bad side is you can't size cases that have not been shot in that chamber down enough to fit well.

 

[xswanted]

Sounds like it could be one of these two things. Have you trimmed the cases? Trim them to 2.490".
It could be that you are not bumping the shoulder back enough in your sizing.
Also, are you cleaning the sizing lube off the cases well after sizing? Sounds like you have a tight chamber and that can be a good thing and a bad thing. Good because you can get higher velocity with lighter powder charges, be careful and start low and work up your loads. The bad side is you can't size cases that have not been shot in that chamber down enough to fit well.

I haven't trimmed yet. Do you think that would be the issue though? Like I was saying once its in there the bolt will go up and down fine.

How would I bump the should back further after I shoot it? It does this with brand new brass as well.

 

[MrMajestic]

Measure a case fired in both chambers just above the belt. Maybe a case for the Larry Willis collet die.

Never mind, you posted while I was posting... :-[

 

[2506]

As for trimming the case you need to keep all cases the same length so it is wise to trim EVERY TIME you reload them. If the case is too long and you force just the case without it being loaded with a bullet into the chamber you can size the case mouth down when it hits the throat just like in a sizing die. When you then try the case again the mouth of the too long case does not hit the throat and it goes in easy. Trim the cases and see what happens.
To really full length size a case you need to take any slop out of your press. To do this you need to screw the sizing die all the way down to the shell holder with the ram raised. Then lower the ram and screw the die down around a half turn more. When you raise the ram it should have a cam over feel. Also you need to lube the inside of the case neck. If you do not when you pull the sizer button back through the neck when extract the case from the sizing die it can cause the neck to be pulled forward thus pulling the shoulder forward some and this can cause your problem. If you then force that case into the chamber of the rifle when the shoulder hits the inside of the chamber it will size it back down just like the sizing die and then the next time you try it in the chamber it fits. So trim your cases, set the sizing die up correctly, and lube the inside of the case neck and see what happens.

 

[2506]

I just had another thought. If your problem happens with new cases that you have not run through a sizer die it could have something to do with the bolt face and extractor. Check to see of there is a piece of brass shaved from a case rim or some other crud causing the rim of the case to not fully seat under the extractor. Clean it with a tooth brush and solvent.

 

[KMart]

I just had another thought. If your problem happens with new cases that you have not run through a sizer die it could have something to do with the bolt face and extractor. Check to see of there is a piece of brass shaved from a case rim or some other crud causing the rim of the case to not fully seat under the extractor. Clean it with a tooth brush and solvent.

This is where I would look. It seems as if the case head is not getting behind the extractor properly

 

[xswanted]

I just had another thought. If your problem happens with new cases that you have not run through a sizer die it could have something to do with the bolt face and extractor. Check to see of there is a piece of brass shaved from a case rim or some other crud causing the rim of the case to not fully seat under the extractor. Clean it with a tooth brush and solvent.

This is what I was thinking the problem lays, but I was hoping someone else would come up with it.

 

[LeeA]

That would indicate a problem with your extractor. To check it out, remove the bolt and take an empty case and push it straight into the bolt face recess. It will probably be difficult for the case to clear the extractor lip. Also there are likely brass shavings there, plus marks on the case rims of the cases that you did force to chamber. Examination with a good magnifier may show that the feed lip angle is improperly profiled.
You can also compare it with your other 700 that feeds smoothly.

Remington did have a possible issue with the non-riveted extractor around 1983, on the magnum bolt face, according to Lacy's Rem 700 book, and went back to the riveted style on the mag bolt. He also mentions a single example in a 1980 rifle that would not fully chamber a round due to an improperly profiled extractor lip.

I like Remingtons and own, and have owned, quite a number of them over the years, and I've only had to replace one extractor about 30 years ago. otherwise they have mostly all fed and extracted smoothly, including the magnums.

A new extractor, installed by a knowledgeable gunsmith may well be be your best solution.

Lee

 

[xswanted]

Yep, it sure was!

Extractor all the way. I actually modified the one in there with a file and a drummel.

Got it working.

Thanks for the reply!

 

[2506]

Us old country boys ain't so dumb after all. ;D Glad you got things working. By the way Retumbo and 130 gr Nosler Accubonds are wicked on deer out of my 264 Win mag. I have a 27 3/4" barrel and get 3350 fps. Talk about flat shooting.

 

[wboggs]

I also had a similar problem with the extractor on a CDL .300WSM. Easily fixed by honing. This was a new (2012) rifle. Telltale sign was the marks on the rim, indication very slight shaving.

 

[wapiti25]

I too have had a problem with mag bolt face extractors, this is on the newest 700 I bought.

 

[wboggs]

Begin to see a common problem here. Quality control is not what it used to be.