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Thread: Rail Guns

  1. #1
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    Rail Guns

    Hello all

    Does anyone have any drawings of a rail gun or can tell me where to find them please.

    I've got a number of different types of actions and different barrel profiles I would like to swap in and out of it with the view of trying to improve the groups out of all my rifles.

    Your assistance would be greatly appreciated.

    regards

    Alastair

  2. #2
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    Quote Originally Posted by Alastair View Post
    Hello all

    Does anyone have any drawings of a rail gun or can tell me where to find them please.

    I've got a number of different types of actions and different barrel profiles I would like to swap in and out of it with the view of trying to improve the groups out of all my rifles.

    Your assistance would be greatly appreciated.

    regards

    Alastair
    You may not find drawings of rail guns, at least not for free but if you are a craftsman you should be able to make what you want from pictures.

    For example-- http://www.bryantcustom.com/galleries/railguns.htm

    Something to consider also, you state you have several barrel contours and several actions. Rail guns are made primarily of two designs, barrel block and cantilever. This means you may have to build a rail top that you can install a barrel block to hold barrels that have a straight section of at least 3". Then you may have to bolt some actions directly to the top rail and let the barrel hang unsupported, the cantilever type.

    Flat bottom actions such as the Stolle Panda/Teddy/Polar/etc can be bolted directly t the top using their mounting holes and a spacer. Round actions can be held in the bottom vee of a barrel block. Just some things to look for.

  3. #3
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    The rail {unlimited} is not limited to design. Use your imagination and make something that works for you.
    Weeight is not limited. Many are heavier then others. Basicly if you can carry it you can shoot it.
    The main rules are posted in both organizations

  4. #4
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    If I understand the original question, what you want is something to test existing rifles, not to use in competition.

    Depending on the recoil involved, I'd be more apt to try mechanical front & rear rests, maybe bolted to a a single plate, using delrin rather than sandbags. Something like the rimfire one-piece rests, depending on stock configurations & recoil.

    This will remove everything except an odd bit of "gun handling," the bit that gets the rifle & rests running true. The other thing it won't remove, perhaps, is your setup when shooting at multiple targets, as with point-blank CF score. I've always found score a little more difficult than group, as you have to move the rifle but not the rests/bags.

    If you use a hard-recoiling rifle, you'd have to catch it, & even then, it may "bounce," which may or may not happen in the sport you usually shoot. But then, the extra weight of a conventional rail gun isn't available in your normal shooting, either.

    Edit:

    Here are pictures of a couple different ideas from the usual "rail gun." These are for rimfire rifles. As made, I don't know if they'd take what you're shooting, but in any case, it's the idea I'm trying to explain...

    http://www.shotmaster10x.com/yellowjacket.html

    http://www.pappasrimfireproducts.com...piecerest.html
    Last edited by Charles E; 01-16-2012 at 08:00 PM.

  5. #5
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    Don't use the delrin balls with a normal rifle, these only work with the rimfires. The vibrations of a centerfire rifle (LV & HV) and a hard surface to recoil on will make a mess of the target.

    Hovis

  6. #6
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    Thank you Gents,

    That has given me a bit to think about.

    Charles, unfortunately we cannot use your sugestion of front and real rests on a plate as some of the rifles I want to test have offset stocks, ie the butt plate is not on the same axis as the barrel (designed for prone slow fire)

    Jerry, thanks for the link unfortunately when I click on the images they don't open. Also I will have to run with a cantilever design as if I use a barrel clamp it will affect the tuning of the barrel.

    BTW what do you think of the use of linear motion bearings?


    regards

    Alastair
    Last edited by Alastair; 01-25-2012 at 07:14 AM.

  7. #7
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    Quote Originally Posted by Alastair View Post
    Thank you Gents,

    Jerry, thanks for the link unfortunately when I click on the images they don't open. Also I will have to run with a cantilever design as if I use a barrel clamp it will affect the tuning of the barrel.

    BTW what do you think of the use of linear motion bearings?


    regards

    Alastair
    I'm pretty sure linear motion bearings have been tried. I would guess that if they worked or were better we would be seeing more of them in use. I believe Tom Dixon's design uses them though. Looks too complicated for this application IMO.


    Last edited by JerrySharrett; 01-25-2012 at 08:00 AM.

  8. #8
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    If you use a barrel block on a bag gun, competition or hunting rifle, it may not tell you what you are looking for.

  9. #9
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    Gents,

    I was thinking of the following link as a starting point:

    http://www.lm76.com/instant_linear.htm

    The bearings on the carriage are on an eccentric pin which would allow adjustment of the preload on the rails.

    I'm intending to mount the rail on a plate that will allow it to be levelled. In the process of mounting the rail on the plate I'm aware I may have to shim it to ensure it is straight.

    The machine table like top "should" give me the ability to change the bedding blocks for the different barrelled actions quickly. I haven't worked out a dampening method yet but that will fall out of my next question....

    How far can I expect a 308W with 155grn projectiles @ about 2950 F/sec to recoil?

    The barrelled actions would be Barnards / RPAs etc with a 30" barrel

    Thanks in advance

    Alastair
    Last edited by Alastair; 01-27-2012 at 03:03 AM.

  10. #10
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    I'm not an exxpert on rail guns but ive been around awhile. Ive seen Shocks mounted on rails years ago to help with heavy recoil. Small automotive type. Hope it gives you something else to think about.

  11. #11
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    Action?

    Quote Originally Posted by GerryM View Post
    The rail {unlimited} is not limited to design. Use your imagination and make something that works for you.
    Weeight is not limited. Many are heavier then others. Basicly if you can carry it you can shoot it.
    The main rules are posted in both organizations
    I am not in the sport yet but thinking of building a rail. One question I was wondering is how the action fits, some seem to float, others seem to be on pillars, and others seem to be sleeved?? Which would be the most used design you guys see? I would assume this is up for debate as to which is best, but just looking to see what would be my most stable design to begin with in the opinion of shooters who use them? Thanks for any opinions!

  12. #12
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    Gents,

    Does anyone have a current website for the Jay Young Railgun ?

    Links I have been able to find refer to pictures and not much else.

    Thanks in advance, regards.

    Alastair

  13. #13
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    Looks like his host may be down.

    His email is younggns@peak.org .

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