RPR Upgrade Barrel Experiences

Discussion in 'Rimfire & Smallbore' started by RDRFab_65, Mar 26, 2019.

  1. RDRFab_65

    RDRFab_65

    Joined:
    Mar 19, 2019
    Messages:
    3
    My brother and i share an RPR Rimfire rifle for local NRL22 matches. The system shoots well but just cant group tight enough after trying all sorts of things to keep up with the guys who have kidd and volquartsen systems.
    After performing action torque tests and about 15 different types of ammunition we found the RPR we have likes SK Pistol match and another CCI ammo we had shooting at roughly 1082fps average. Unfortunately we see lots of fliers still and cant really get the group any smaller than 1.2" at 50 yards.
    We have decided from these results to upgrade the barrel and trigger and are wondering what your experiences are with different manufacture barrels. We are trying to stay in the $350 and below range on a barrel and have run across some manufactures that we are not familiar with: Green Mountain & Shaw.
    We appreciate any experiences you can share with us.
    Alex
     
  2. Boyd L.

    Boyd L. Witty comment under development Gold $$ Contributor

    Joined:
    Dec 29, 2015
    Messages:
    362
    This is an answer to a question you didn’t ask, but if your fliers are intermingled with “good” shots on target I’d be inclined to think your issue is inconsistent ignition.
    While a good barrel certainly won’t hurt it may not be the issue.
     
    Last edited: Mar 26, 2019
    Ggmac likes this.
  3. RDRFab_65

    RDRFab_65

    Joined:
    Mar 19, 2019
    Messages:
    3
    We never thought about it that way.
    Sometimes it will make a few groups without a flyer and other times its every other group i see a flyer. I know i have pulled a few but the ones where i absolutely have no idea what happened, those are the ones im counting as flyers.
    Are there known ignition issues with the RPR22 that i can look into further?
     
  4. cmillard

    cmillard

    Joined:
    Jan 15, 2009
    Messages:
    1,364
    Just rebarrel! I had same issues and ALL issues went away when I took barrel off and put on a Green Mountain barrel. Shoots lights out now and consistent
     
  5. RDRFab_65

    RDRFab_65

    Joined:
    Mar 19, 2019
    Messages:
    3
    That GMR barrel is thinner than the Shaw. How is the balance on your setup?
     
  6. Boyd L.

    Boyd L. Witty comment under development Gold $$ Contributor

    Joined:
    Dec 29, 2015
    Messages:
    362
    Any inconsistency in firing pin mass, velocity, depth of strike, or location of the strike can cause a flier (at least a flier as defined by BR shooters) with some ammunition.
    A smooth, unimpeded firing pin fall, a bit stronger spring, and a properly profiled tip are usually described as “fixes”. I’m not familiar with the RPR’s firing pin setup so my advice might only apply to someone with an Anschutz, a Remington 540-580 series, or 40-X.
    I would think that somewhere there’s someone who is familiar with the firing pin and could advise if it’s a spot of concern.
     
  7. Tim s

    Tim s

    Joined:
    Feb 7, 2013
    Messages:
    529
    One of the easy things is to see what type of pin strike you’re dealing with given not to many great fixes available via the internet.
    If you get ambitious take a good image of your pin tip
    With the bolt in fired position and one or two fired case heads.
     
  8. cmillard

    cmillard

    Joined:
    Jan 15, 2009
    Messages:
    1,364
    It is shorter than stock (16.5 vs 18) and .920 diameter (I think). Balances well!
     

Share This Page