Rem 700 SPS 300 blackout issues

F

Fox84

New member
Picked new gun up this week. I tried to cycle gun with some 300 bo rounds and the bolt won't close on rounds all the time. When it wont close it wont eject round and I have to push round out with dowel rod. The same round will cyle ok once every 3 try's. Some times if you turn the twice it will close on the round. Should I try a trip to the range or should I just send back to Remington.
This is my first 300 bo bolt gun. I haven't had issues with any of my AR 300s
 
If it's doing it with different brands/types of ammo, it might be a short chamber/headspace issue. Definitely do NOT try and shoot it with it being difficult to chamber rounds. Send it back or take it to a gunsmith.
 
Well, I tried diferent reloads and they cycled fine. I think the issue is newly formed brass. The rounds that run fine are fire formed brass, reloaded a couple times.. We will see
 
Sounds like your extractor is not slipping over the case rim. That would be the reason the cartridge is left in the chamber and the bolt won't close.
 
did it do it with ANY factory ammo, or only reloads. sounds like you are having a similar issue as I was having here my shoulder was not getting set down far nough and it was getting stuck on shoulder. but if your saying this is also happening with factory ammo, then nevermind.

also know that with reloads, their are some brands of brass that have too much rim thickness to allow the round to chamber with a .308 bullet. just too much brass around the bullet making it too large for a normal chamber. your rim thickness needs to be below .013 if I am remembering correctly.

I was using lee dies with mine, so I couldn't set my shoulder back anymore after contact with shellholder, so I had to grind less than 1/ 32nd off the shellholder than all was well.

good luck. took me many tris to finally get successful consistent chamber re-formed brass in my 300BLK. I was thinking I had chamber issues in the beginning, but did not know all the issues with forming brass. found out my gun is just fine. if you haven't just grabbed a box of factory "summit" or the like to find out, you should start there and that'll answer at least one question

here is an on-going thread of brass that is too thick to chamber after bullet seating, pretty good list and some good info on the issue entirely
http://www.300blktalk.com/forum/viewtopic.php?f=141&t=88599
 
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Best way to avoid problems when making brass from once fired cases is to use a "small base" SB sizing die. These dies resize a case to SAAMI minimums making it easy to chamber, since not all chambers are exactly the same. If you're using the same brass in multiple rifles SB dies are the only way to roll, but you will shorten the life of your brass.

I had a buddy that gave me his BLR in .243 and a bag of range pickup brass to load for it, I had about a 10% success rate getting the brass to chamber with my FL sizing die. However, new factory loads chambered easily and so did the reloads from that brass. I had him buy a set of SB dies from RCBS and it solved the problem, and any piece of brass I resized with that die would chamber in that BLR without issues.
 
Went to the range today. It was a shoulder issue with the bolt not closing on reloads. I shot 50 rds without a bolt closing problem.
The rifle has issues cycling ammo from the magazine. Pretty much a single shot. The magazine and follower are a pitiful cheap design. I didn't expect this from Remington. Wish I had a detachable mag.

The reloaded ammo I was having issues with in the bolt gun ran fine in my Ar today. Ran 2 mags, 60rds flawless.

I'am questioning bolt action, subsonic and the supressor plan.
 
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that sucks, if you can't bump the shoulder back, do what I tried and get another 223 shellholder and grind it down a hair. it'll keep it for getting stuck on the shoulder for sure, then if you save the brass from the bolt when you reload for the bolt, it shouldn't give you hassles, since you cant resize the shoulder back UP too far, I don't think at least.

I am still curious though, was this a problem with factory ammo at all? because when I measured my factory 300 brass to my lee resized brass, the shoulder was clearly too high. maybe your AR just has a larger tolerance in that area that the bolt does not. my lee dies were without a doubt, out-of-spec, at least when using a regular .223 height shellholder
 
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