Gunsmithing Issues chambering round with newer 700 SA

J

JSWM3

Private
Minuteman
Aug 13, 2012
10
0
36
Louisville, KY
#1
Hey guys, long time lurker first time posting here. Have an issue with a new 700 AAC-SD I picked up last month. I'll try to provide as many specific details as I can about the problem in hopes to move the troubleshooting process along and to get any insight on what my next step might be here.

In short, I'm currently unable to close the bolt on a live round. Meaning the round itself is either not seating far enough into the chamber or the bolt is getting hung up somewhere.

Details:

- Picked the rifle up new in early August, bedded the base mounted/leveled everything off and took it out to the range to sight in the following week.

- Got it zeroed in and put 79 rounds downrange. 40rds of Federal 168gr GMM, 20rds of 168gr Ultramax (remanufactured) and 19rds of Aussie surplus 7.62. Had 1 round of the Aussie surplus fail to chamber, but I chalked it up to just being a bad round as all subsequent rounds cycled normally.

- Fast forward to last week, installed a new AICS 1.5 chassis. Installed and torqued to manufacturers specs according to directions. Everything appears to be functioning as it should, no issues cycling the bolt on an empty chamber, no feeding issues etc.

- Yesterday afternoon I took it out to the range to test fire with the newly installed AICS. First round chambered and the bolt will not close or extract the round. Removed the bolt inspected chamber and it appears as though the round is not completely seating in the chamber. Removed the round and inspected the chamber, bolt face, throat, bore and made a few passes with a clean patch to ensure there wasn't an obstruction or any build up of any kind. Switched the ammo up, no dice, still unable to close bolt on a live round. Even grabbed a spent casing out of my range bag that had cycled normally from my previous trip to the range and it too failed to seat.

- Got it home last night removed the bolt, inspected everything again with a bore light, no signs of damage, build up, burrs or any obstructions what so ever. Made a few more passes with a brush, clean patches and some solvent. Still no luck.

- So I have tried (5) different types of factory ammo including the previously fired casings, thoroughly cleaned it and have checked to make sure neither action screws or base screws are protruding and/or interfering with anything. Next step will probably be to disassemble everything and reinstall the factory hogue stock to see if I can isolate the problem to the new chassis.

hYoGf.jpg


With the way the casing is getting stuck in the chamber, common knowledge leads me to believe there could be an issue with head spacing. But the fact that the rifle was operating correctly prior to installing the new chassis (save for one stuck round of Aussie surplus) has me questioning what else could cause this kind of problem. Something related to the trigger group possibly?

Any suggestions on where to start looking if changing the stocks out yields the same results?
 
#5
Re: Issues chambering round with newer 700 SA

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wilecoyote</div><div class="ubbcode-body">forgive me ,but you're really sure that you don't have some round portion of splitted neck,from some faulty brass,wedged inside the chamber? </div></div>

Nothing that myself or other have been able to find under close inspection with a borelight. Clean as a whistle.
 
#6
Re: Issues chambering round with newer 700 SA

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JSWM3</div><div class="ubbcode-body">Yes, closes and cycles freely without a round chambered. </div></div>

Does the bolt also close fine on a cartridge when the action is pulled out of the chassis?
 
#8
Re: Issues chambering round with newer 700 SA

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Take it out of the chassis stock and just see what happens.

Just humor us. Shouldn't make one bit of difference, but lets just see.

</div></div>

Bolt handle interference is different with the action removed from the chassis...
 
#10
Re: Issues chambering round with newer 700 SA

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 2156SMK</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JSWM3</div><div class="ubbcode-body">Yes, closes and cycles freely without a round chambered. </div></div>

Does the bolt also close fine on a cartridge when the action is pulled out of the chassis?</div></div> <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Take it out of the chassis stock and just see what happens.

Just humor us. Shouldn't make one bit of difference, but lets just see.

</div></div>

Going to pull the action now, I'll report back on that in a few.
 
#12
Re: Issues chambering round with newer 700 SA

Sounds like your extractor may be out of place.

Can you snap a round onto the boltface with the bolt removed from the action?

You should be able to do it by pushing the round more or less striaght back into the boltface.
 
#13
Re: Issues chambering round with newer 700 SA

Still no luck with the action removed. Anything else I could be missing here? My only other thoughts would be to have the headspace checked or give Remington a call.


<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: my human host</div><div class="ubbcode-body">Sounds like your extractor may be out of place.

Can you snap a round onto the boltface with the bolt removed from the action?

You should be able to do it by pushing the round more or less striaght back into the boltface. </div></div>

Yup, snaps and grabs just fine.
 
#14
Re: Issues chambering round with newer 700 SA

Sir,never heared about self-shortening headspace_from the picture the round seems to fail to seat well over any headspace issue,anyway,as if a supplementar ring be inserted inside:more of that,I can't figure_ I'm sorry about my poor diagnosis_good luck
smile.gif
 
#16
Re: Issues chambering round with newer 700 SA

Still sounds like the extractor is not clipping over the rim of the case. If it is not extracting and the bolt isn't closing this sounds like the issue. try pulling the extractor and seeing if it will close then. Sometimes there is buildup behind the extractor and it won't allow it to compress.
 
#18
Re: Issues chambering round with newer 700 SA

Bingo

Removed the extractor and the bolt now closes as it should. Going to go ahead and order a couple extra from brownells. Finally starting to see the value in the Sako kits now after pulling the factory piece firsthand...

Appreciate the advice guys.
 
#19
Re: Issues chambering round with newer 700 SA

I would strongly, STRONGLY discourage you from installing a Sako extractor in your Remington.

Here's why:

The Sako is meant for 3 lug bolts/receivers where there's only 60* of bolt rotation. 60* means one of the receiver lugs bisects where the extractor lines up on the bolt.

With a twin lug 90* bolt its different. When the gun is in battery the extractor is almost directly in line with the ejection port side raceway. Meaning its NOT supported. The only thing holding that extractor in the bolt is a spring/plunger/ and some fancy mechanical interaction.

In the event you sneeze a case there is a very REAL possibility that it will come shooting out of the gun. I know of three cases in the last 3 years that ended up in emergency rooms and glass eyeballs/eye patches (arrrrrgggghhhh, my gun gotz me, arrrrrggggghhhh)

No kidding.

If your going to go to a different system, consider the AR15 style. Just as good but it has the benefit of a cross pin that'll help keep stuff put if a case ever lets go.

Good luck.

C.
 
#20
Re: Issues chambering round with newer 700 SA

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">I would strongly, STRONGLY discourage you from installing a Sako extractor in your Remington.

Here's why:

The Sako is meant for 3 lug bolts/receivers where there's only 60* of bolt rotation. 60* means one of the receiver lugs bisects where the extractor lines up on the bolt.

With a twin lug 90* bolt its different. When the gun is in battery the extractor is almost directly in line with the ejection port side raceway. Meaning its NOT supported. The only thing holding that extractor in the bolt is a spring/plunger/ and some fancy mechanical interaction.

In the event you sneeze a case there is a very REAL possibility that it will come shooting out of the gun. I know of three cases in the last 3 years that ended up in emergency rooms and glass eyeballs/eye patches (arrrrrgggghhhh, my gun gotz me, arrrrrggggghhhh)

No kidding.

If your going to go to a different system, consider the AR15 style. Just as good but it has the benefit of a cross pin that'll help keep stuff put if a case ever lets go.

Good luck.

C. </div></div>

Yeah, think I'll pass on that idea for now haha. Googled a bit more on that issue after reading your post, surprised to see how popular they are despite this. Not sure I'm sold on the ar15 style either tbh. Will stick to the factory replacements for the time being
wink.gif
 
#22
Re: Issues chambering round with newer 700 SA

JSWM3,

Forgive me for asking, but is your total round count on this rifle 79? Just wanted to know if this problem developed early in the life of this weapon or if you have several 1000 round
down the tube.

Chet
 
#23
Re: Issues chambering round with newer 700 SA

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jetmd</div><div class="ubbcode-body">JSWM3,

Forgive me for asking, but is your total round count on this rifle 79? Just wanted to know if this problem developed early in the life of this weapon or if you have several 1000 round
down the tube.

Chet </div></div>

Correct, 79 rounds total. I've only had the rifle out to the range twice. All rounds were fired during the first outing, wasn't able to shoot during the second trip due to the issue with the extractor.
 
#24
Re: Issues chambering round with newer 700 SA

The extractor you have might get you by until a replacement shows if you take 2 pairs of small pliers a gently tweak it into shape. I would still order a replacement, tho.

My experience with other types of extractors is somewhat limited. I will say the Remington unit works very well when properly set up.
 
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