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Putting a scope on the K31 Swiss

Discussion in 'Rifle Country' started by pccraig, Dec 29, 2006.

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  1. pccraig

    pccraig Member

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    Am I crazy ?

    I've heard and read alot about the fine craftmanship and accuracy surrounding the K31 Swiss. Next month I plan to buy 2 at a local gun show. One I will keep, maintain, and shoot as is.

    The other, I'd like to experiment with. I'm planning to remove the iron sights, outfit it with a sport stock, barrel mounted scope, and bi-pod to see what kind of groups I can get from 600 to 1000 yds.

    Any suggestions ?

    Thanks

    Pat
     
  2. DMK

    DMK Member

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    I scoped my best shooting K31 and free floated the barrel in the original stock. Unless you look at it closely from the muzzle, you'd never know it was floating. It shoots great! I'm still experimenting with a little up pressure at the muzzle, but I'm not sure it's making any improvement.

    I tried that rear sight scout mount and hated it. I ended up with the clamp on Pierre St. Marie mount and I'm very happy with it. I just couldn't bear to drill and tap it and I don't think it's really necessary. The clamp on mount is very secure. And the best part is you can still use the irons as back up sights without changing anything

    One of the best things I did to it was just clean the trigger parts. I took the trigger completely apart, and it was full of junk and old grease in there. Just cleaning and oiling made a huge difference.
     
    Last edited: Dec 29, 2006
  3. Essex County

    Essex County Member

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    My advice is to get a Pierre St. Marie Clamp on mount and keep the iron sights. Scout set ups suck, even though they are popular. One of My K 31's is set up this way, with a Weaver K-6 and it's very workable. I have a couple of Milsurps set up with ths Scout rigs and they are neither fish nor fowl. Essex
     
  4. 270Win

    270Win Member

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    Agreed. Get the clamp-on mount, keep the iron sights. Especially for long-distance shooting, scout setups are not the best option. The Swiss, who invented the rifle and regularly shoot it in matches, use a "regular" scope position, when they use a scope at all.

    Why the sport stock? I doubt it will offer any improvement over the regular one... unless you intend to mount the bipod to a sling swivel...? The regular stock is easily channeled for a floating barrel. Why a bipod at all, unless limiting yourself to prone shots?

    A strange but somewhat interesting project, though.
     
  5. Davo

    Davo Member

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    A scout mount is not suitable for long range shooting. I recommend a clamp on scope mount and good rings. You will need a cheek pad of some kind, and dont worry...you can still use the irons. I also lightly polished the sear surface and it improved an already excellent trigger.
    Mine will shoot MOA on a good day with gp11, typical groups are more like 1.25 at 100 yards. There is some improvment to be made with reloads, but not much. The GP11 round is superb and made with long range shooting in mind.
    Heres mine...
     

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  6. pccraig

    pccraig Member

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    Very nice,

    I was thinking that the barrel mouted scope would help keep the barrel vibration down.

    Also, what are your thoughts on adding a muzzle break.
     
  7. cracked butt

    cracked butt Member

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    Pierre St Marie (he's the guy who makes most of the scope mounts for K-31s)was experimenting with muzzle breaks and produced a few prototypes that actually increased accuracy- I'm not sure if he's manufacturing them yet or not.
    I'd go with the clamp on mount or drill/tap mount. I have a Clamp on mount myself and am very happy with it. The only downside is that it used a 3/8" rail and it can be hard to find a decent set of rings for it. I tried some aluminum rimfire rings, and it wouldn't hold zero. I ended up buying a set of Burris steel rimfire rings and it holds a zero very solid now.

    I agree with others about the gp-11 ammo: if you can get it, shoot it. My besthandloads aren't much better.
     
  8. Jackal

    Jackal Member

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    How do those St. Marie mount work for different distances? For instance, since the mount isnt centered, if you zero at 50 yards, will your poi at 100 yards move diagonally?? I just ordered an S&K scout mount, but I would be interested in a standard scope mount.
     
  9. Davo

    Davo Member

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    Yes Jackal, since the scope is about 1 inch off center you can deal with the slight amount of change in POI, or you can just zero exactly 1 inch right at 100 yds, or you can cant the rifle so its perfectly over the bore (its actually very comfortable but you must be consistant).
     
  10. MechAg94

    MechAg94 Member

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    My clamp on mount is very solid and stable. I like it a lot. I haven't tried beyond 100 yards yet. Either way, the clamp on mounts are pretty cheap and you might be able to experiment at longer range before modifying the rifle. AIM Surplus used to sell the mounts, but I don't know who sells them now.
     
  11. dispatch55126

    dispatch55126 Member

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    DMK, how did you float the barrel? Did you shave the inner portion of the stock? I have a 91/30 and I've never thought of that.
     
  12. spitfan

    spitfan Member

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    Certainly go with the clamp-on mount from St. Marie (not the knock-offs). Put the Burris Signature rings on it so you can use the different inserts. Then you can use whatever scope you want. Then try the St. Marie bipod adapter and the damper. I have this set up on one of my six K-31s with an Elite 4200 6-24 mil dot and it will consistently shoot 1 moa or better with handloads. I have used this rig out to 1000 yards with no problem. The beauty of this whole thing is the simplicity. Everything goes on and off with 1 screw and is not pernament and is rock steady. The damper being the exception. Not only is this setup fast, easy, non-pernament, no gunsmithing, and solid, it looks really cool too!!! I'll try and post a pic after the holidays.
     
  13. DMK

    DMK Member

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    Yes. I wrapped some sandpaper around a deep socket and increases the channel size, test fitting the action until it wasn't touching. I had to do this to the top handguard too.

    Although I also did it on a M39 Mosin, I'm not sure if it would work on a 91/30 because the top handguard is so thin. I had considered it on one of my 91/59 carbines and never did it for that reason. I suppose you could leave the top handguard off when shooting or set the action down into the stock more.
     
  14. Seminole

    Seminole Member

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    Ok, I'm fairly new to rifles and haven't ever put a scope on one, but I do have a couple of K31s and I want to scope one. My apologies in advance for the elementary nature of my questions.

    I'm going to order the St. Marie mount. Now to the rings. Both Brownell's and Midway carry the Burris Signature rings, but I'm not sure which ones I need. Do I need the 1" or the 30 mm? Or will it depend on the scope I use? Also, what about height? Is the medium or the high more appropriate for a K31?

    How does one decide which inserts (if any) to use?

    And what about the scope itself? Given that the rifle itself isn't very expensive, how expensive a scope do I need? Any recommendations as to type?
     
  15. silverlance

    silverlance Member

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    Boy I wish i could afford one of those k31 snipers. Even a repro would be nice.

    I have a walnut k31 in unissued condition that the last owner drilled and tapped. he then put regular mounting pieces into the reciever, and put a cheap barska 10x or so scope on it. It looks great, but it's sad that this spectacular rifle has cheap hardware bolted onto it.

    But -

    How does it work? Well I get 3" regularly at 100 yards, and I'm a lousy shooter. I can hit bowling pins at 250 yards. It doesn't eject very well - I often have to either remove the magazine or shake the shell casing out.

    But for 180, I'm pretty happy with it. It's not as if I can't remove the mounts one day and plug the holes back up.

    Besides, ugly rifles make me comfortable =)
     
  16. roo_ster

    roo_ster Member

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    St Marie Clamp-on Mount Center-of-Forehead Ribbon

    First off, the St Marie Graphics clamp-on mount is quality.

    But, be sure you get yourself a scope with generous eye relief and prejudice your mounting it forward.

    Otherwise, if you shoot it prone while trying to use the irons, it is possible that you could end up with a whomp dead-center on your forehead. It is a real good test of the strength of the mount & rings.

    My mount & rings passed with flying colors & moved not a smidge.

    I am thankful I always wear a baseball cap to the range.
     
  17. cracked butt

    cracked butt Member

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    A repro would probably as expensive to make as the real thing. The K-31 snipers have a special stock that has the entire barreled action and magazine canted to one side so that the scope is mounted directly over the bore line while leaving the ejection port clear.
     
  18. DMK

    DMK Member

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    Brownell's has a clamp on mount. I think it's th St Marie mount but now I'm not sure. That's where I got mine from, but I can't remember the name on the packaging. It has a 3/8" dovetail and uses scope rings that would fit a .22 or .17 rail.

    Most American scopes are 1" tubes. Verify that when you buy your scope.
     
  19. DMK

    DMK Member

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    The ZFK55 is really a whole new rifle based on the K31.

    http://www.swissrifles.com/sr/sniper/

    There were a few surplus ones for sale a few years ago. They were going for a little over 5k.
     
  20. swingset

    swingset Member

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    Actually, they were only around $2200 with about $200 to get them here, if you wanted to import one directly. Some greedy dealers tried to tack on an addl. $1500-$2000, and worse some idiots actually paid it, but the '55 was never that much money if you bought it from the source.

    Heck, I just saw a mint one at a collector's show for $3800 with all accessories, and no one was gobbling it up. It's been in this dealer's hands for 6 months or more.

    I've got a K-31/43 sniper, but mine doesn't have the prismatic scope anymore and they're impossible to get your hands on. It came from Switzerland with a Meiji Japenese 6x scope on it, no idea of the history behind that, but it looks like a typical European sniper's scope.
     
  21. srv656s

    srv656s Member

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    I put a scope on my K31 with the clamp mount and couldn't stand it. The offset scope was irritating to use (very uncomfortable to get it into a shooting position) and the ejecting brass would consistently impact the scope, most times it wouldn't even leave the gun, it'd fall back into the ejection port and would jam the next round from chambering. I ended up giving up on the project and purchased a Remington 700 instead. Much more available ammo and a much more natural mount to put a scope on...

    Shawn
     
  22. 270Win

    270Win Member

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    Do you still have the K31?
     
  23. srv656s

    srv656s Member

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    I still have 2 K31's... I love the gun, just didn't like how it handled (or functioned) with the scope on it.

    Shawn
     
  24. 270Win

    270Win Member

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    Good!! I thought for a minute you'd given up on them ;)
     
  25. dolanp

    dolanp Member

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    This was similar to my experience. I think I will take the mount and scope off of my K31 and leave it in its original beauty and put my scope on a different rifle. I had originally thought about hunting with the K31 but thinking about shots at 200+ yds I didn't want to have to think about the windage issue with it not being over the bore and ending up wounding some animal and having it run off.
     
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