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Thread: Railguns

  1. #1
    Join Date
    Jun 2015
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    121

    Railguns

    I know absolutely nothing about rail guns. I am hoping someone with experience with these can help me. Until today I have been under the assumption that rail guns were not allowed in rimfire benchrest shooting. You know what they say about assuming. My take on rail guns were the best ones pretty much shot one hole groups on a regular basis. Under this assumption why do you not see more of them in that discipline. I understand that moving them from bench to bench would be a pain, but if they can traverse a target and shoot accurately I can't figure out why I don't see more of them.

  2. #2
    Join Date
    Feb 2003
    Location
    San Antonio
    Posts
    309
    They are allowed in some RF sanctions. ARA & PSL for sure. It took me a couple of years to sort one out to shoot RF with. Not worth the effort. The main issue is the "vibration" dampening. Think of the impulse energy generated from a quick 15K psi chamber pressure. That pulse travels on the barrel, through the action, into the "stock", to the rest, and eventually the ground and reflects back until it dissipates. It varies in speed in different media (19000 fps in steel) as well as reflecting some at every joint. You end up with a mess of "vibrations". The best deal is to attenuate and or time them to cancel or coincide at a precise time. The RF has 2.2 ms of barrel time and a CF is 1.25. A "hard" railgun requires strategic design and assembly to deal with these issues. It is much harder to get a RF to shoot with that platform due to the long barrel time. It has been tried enough times with little success. If your sanction allows it, have at it. Your competition will be glad you did. But you never know, you might come up with a "better" mousetrap.

  3. #3
    Join Date
    Jun 2015
    Posts
    121
    No no Mr Jerry. You got it wrong. I have two benchrest rifles. I didn't realize the inherent problems with using a rimfire cartridge in a railgun. I was just wondering. Thanks for the explanation.

  4. #4
    Join Date
    Feb 2003
    Location
    Tennessee
    Posts
    4,619
    Folks shoot a different type of rail in rimfire. It works the same and does a really good job making a bag gun shoot a target with little effort. Just put your rifle in the rest and voila...rail gun.

    Here's a small picture of such a rest....

    https://www.killoughshootingsports.c...pappas5lrg.png

  5. #5
    Join Date
    Jun 2015
    Posts
    121
    Mr. Wilber I understand. I recently purchased a Cliff Arnold rest. It is a work of art. Would also like to say Mr Arnold was great to deal with.

  6. #6
    Join Date
    Feb 2003
    Location
    Mesa, AZ
    Posts
    103
    Click image for larger version. 

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    I made a sleeve from a 1.250 barrel to slip fit over the .900 barrel and J-B'd the sleeve to the barrel.
    The sleeved barrel is mounted in the v block and torqued to 40 in. pounds.
    Shoots great.
    Last edited by Gene DeLoney; 09-02-2017 at 03:21 AM.

  7. #7
    Join Date
    Feb 2003
    Location
    Mesa, AZ
    Posts
    103
    Click image for larger version. 

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    Here is the complete gun. I do use a tuner but was off when this was taken.
    Last edited by Gene DeLoney; 09-02-2017 at 03:37 AM.

  8. #8
    Join Date
    Feb 2003
    Location
    Tennessee
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    Gene - Is that a rimfire gun?

    Really nice lookin' rail!

  9. #9
    Join Date
    Feb 2003
    Location
    Mesa, AZ
    Posts
    103
    Quote Originally Posted by Wilbur View Post
    Gene - Is that a rimfire gun?

    Really nice lookin' rail!
    Wilbur...Yes it is. Rail is RFD. Turbo action, Benchmark 2 groove barrel, Langley trigger.
    Legal for ARA unlimited.
    Same gun I use in NBRSA Unlimited......... just put the 6 ppc barreled action back into the v block.
    Gene

  10. #10
    Join Date
    Jun 2015
    Posts
    121
    Mr. Gene that is a very interesting rail gun. I have a friend from Nevada coming to shoot in the Arizona state match. He is telling me that the guy to beat shoots a rail gun. I have a feeling he is referring to you.

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