Issue with Ruger GSR bolt lift, help me sort this out

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Iron Sighted

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Guys, I've noticed that my scout rifle(.308 version) is a royal pain to open the bolt on with a round chambered(fired or not). Usually the bolt will close with no issue, though maybe one in 5 will feel really stiff when rotating it closed and locking up the lugs. This stiffness is always present when opening the bolt, and usually worse than the stiffness encountered closing the bolt. Once the brass is removed I can see an obvious scored mark in the brass on the side of rim that runs maybe 1/4 of the way around the rim that looks to be shallower in one end and running deeper to the other end of the scoring. It appears to my unschooled eye that this is maybe from the extractor not popping over the rim and just riding the edge of it. Do any of you more experienced guys here know of/have seen anything like this before, and if so, how did you fix it? I was hoping to use this gun on Thurs. for a goat hunt but I think I'll take the .375 instead as it is currently operating properly though the trajectory with 270 TSX's probably won't be quite as nice as the 150gr SST's in the .308.

Thanks, for any advice offered.

***Update, after not firing this rifle for quite some time I have decided to revive this thread as I am still having this issue with heinous bolt lift after chambering a round regardless of having fired it or not. Attached below(hopefully) is another picture of the chewed up edge of the case head/rim, I believe this is what is happening each time upon lifting the bolt up. I feel like this has to be the extractor doing this the brass, what else could contact that part of the case?
On a side note, who warranties Ruger in Canada? I may try to go that route if I can't figure this out myself.

 
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Do the bolt lugs look galled? ie: binding on opening.

I don't think the bolt would close properly if the extractor was riding on the edge of the brass.
 
I'll have a closer look at the lugs. The strange scored marks on the outeredge of the rim had me wondering as I've never seen those before on any other rifle.

I may have mis-spoke earlier, this issue happens everytime extracting fired brass(including if I load a spent case back in), but only sometimes when closing the bolt on an unfired round, usually those will feed and eject with no issue but there certainly have been a few times where camming the bolt closed on a live round was really difficult and there was definitely resistance present that shouldn't be there. My chamber is longer than my mag, so I know the O.A.L. of the rounds is not too long.
 
I had the odd hard to chamber issue in the beginning. A quick polish on the face of the extractor fixed that.
 


Hopefully that works, I tried to attach a picture of the rim from one of the fired pieces of brass where you can see the gouge in it. Taking the pic with my cell phone so I apologize for photo quality.
 
Well, all the issues so far have been with Federal brass. I tried replicating with a handful of Federal, Winchester, and Remington brass that had all been sized and trimmed at the same time. Two of the Federal cases bound a bit and had extractor marks on the edge of the rim, though nothibg like what is seen with the fired cases. The Win and Rem brass fed and ejected without issue. I'll have to load some rounds with the Win and Rem brass only and see what happens, though I still think the rifle should cycle all types(provided they're produced within proper tolerance).
 
Gatehouse said:
Did you ever determine if brass manufacturer was contributing to the problem?
Click to expand...

It doesn't appear to be, have cycled brass from 4 different manufacturers now and I get the same result every time. I have managed to also get the same result by putting sized but unloaded brass in the bolt under the extractor through the mag well and closing and opening the bolt, it still is stiff to open and gouges the edge of case.
 
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