New K-31 and a problem


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MilsurpShooter
May 7, 2007, 12:40 PM
Well, I was staying away for as long as I could but a buddy of mine pretty much twisted my arm and brought me to the gunshow. I've been trying to curb my spending lately (house taxes were just paid and I'm trying to rebuild the savings) so I wasn't going to go.

Anyhow, took the drive up, walked around a bit, kept my hands in my pockets, didn't look too closely at the gun tables, more of the knives and accessories... Well one did catch my eye. A Swiss K-31 in Walnut with a few dents but not nearly the beaver chewed stock that I have seen of these rifles. I picked it up, cycled it, inspected it... and put it down. I'd been waiting for my C&R so I could get one of these, well they charged me on March 7th, and on April 27th my application was submitted for review (as per the lady on the phone) I wanted one of these before they got any harder to find. Anyway my buddy was just about done, he was happy with his new Remchester whatever he bought, they all look the same to me, and he asked if I was going to buy the K-31. Didn't think I was that obvious. Anyway, after a little haggling, talking to the dealer about how scarce the ammo was and the like, he came down another $30. All matching, minor blue wear, walnut stock for $110. Brick of ammo with it came added $32 to it though lol.

Anyway, got it home, tested it out a little. Brought it down to the workshop to take a look. Pulled the bolt back to get ready for dis-assembly... That was a little tough. Go to push the bolt forward, that's a little tougher then before too. I read something about how they won't close on an empty mag so I pushed down on the mag and slid the bolt forward. Again a little hard. Tried to test a few times and each time the bolt got a little harder and harder to cycle. It's not tough to cycle to the point where I can't do it, but it does take a bit of effort.

Anyhow, took the rifle down, all the numbers match and I'm honestly impressed by the way these things are made and the way the bolt operates. Cleaned some errant cosmolene and grease from the throat and the bolt face and re-assembled. Same problem, cycles but takes a bit of effort.

My question, is this normal for the K-31? I know a bolt shouldn't just open with your pinky finger but this is a bit of effort, either that or I'm just doing it all wrong after my bolt action rifles. I'm left handed too so I could be putting pressure in places that aren't used to it and binding?

Secondly, how tight should the screws on the barrel bands be? I've heard the barrels are free floated so tightening them down to max probably is not the best idea.

Thanks for any help guys

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MikeJackmin
May 7, 2007, 12:49 PM
No, it shouldn't do that. This is a rifle with a very smooth action.

My first guess is that the bolt body may be full of grease. Follow the link below for disassembly instructions (I threw all the pieces into a saucepan full of soapy water and simmered them on the stove to loosen the crud, worked great). Make sure everything is dry and lightly oiled before reassembly.

Clean all the nooks and crannies in the reciever as best you can, too, including the places where the lugs of the bolt go. (Make certain there is no grease in the chamber or the bore, while you are at it!)

http://www.swissrifles.com/sr/rheadrick/k31bolt.html

velojym
May 7, 2007, 01:11 PM
Mine cycles fine, but you may notice it'll be smoother and easier with a loaded rifle. I'm not a 'smith, so I'm not sure exactly why.

.45&TKD
May 7, 2007, 01:14 PM
I've read that some can be a little stiff, with no ill effects
Mine is a little stiff.
But when I am working it with ammo at the range, I don't notice.
I would just clean it up real good, and mabe put a little grease on the rails.
The Swiss actually used grease on these, not oil.

The left hand usage is another variable.

busdriver72
May 7, 2007, 01:31 PM
Mine was more stiff empty than loaded. When loaded it was smooth.

MilsurpShooter
May 7, 2007, 02:34 PM
Thanks for the info everyone. I'll probably dis-assemble it again when I get home from work today, do a more thourough cleaning of the bolt and oil a few spots a little more.

There any ill effects on the ammo by cycling it? Won't score a bullet or mess up the wax ring and make it unfireable? Only got about 60 rounds on hand right now (another 480 on backorder *cross fingers*) I'll see what I can't find for grease too, maybe using oil over grease is the problem.

See if I can't get a picture or two either with a cell camera or something lol

.45&TKD
May 7, 2007, 02:57 PM
There any ill effects on the ammo by cycling it? Won't score a bullet or mess up the wax ring and make it unfireable?

Maybe I'm paraniod about saftey, but there is no safe place to point a loaded high powered rifle in my house. I would save loading the rifle for the range, especially with a new milsurp.

SnakeEater
May 7, 2007, 03:34 PM
A few guys above got it right. On most K31's the action is noticeably smoother when cycling while loaded. You will not harm the ammo by doing this. Just take her into the backyard and point it at the ground.

but there is no safe place to point a loaded high powered rifle in my house
What about a loaded "low" powered rifle?:neener:

270Win
May 7, 2007, 03:50 PM
+1 to the rest of the guys here. I have three, and two are stiffer when unloaded than when loaded. The third is just butter all day long; go figure.

I found that if you primarily use a snap-like motion with your wrist when locking or unlocking the bolt, the perceived effort decreases noticeably. I'll try to make a video or something and post it on YouTube, then link.

Nice find, btw! $110 is a great, great price for those; in my area, the MINIMUM is now $200, and $250 is more like it.

MilsurpShooter
May 7, 2007, 11:04 PM
Just an update I tested it again a little bit ago. Loaded 2 in and cycled, not nearly as stiff. I also oiled the bolt a bit, used a tiny dab of grease on the sides and it's functioning much better then before. I tried it unloaded one more time and yep, stiff. I think it's a combination of things, straight pull design and me being used to bolts, left handed. I also thought it felt easier if I took hold of the handle between middle and ring finger and pulled back, before I was using my middle and index finger. Could be I wasn't putting as much pressure into the side of the rifle, getting a clean straight back pull as opposed to straight back with pressure towards the left of the rifle.

And regarding the high power in the house, let's just say they don't build the basements like the one I have anymore lol

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