Saturday, May 12, 2018

Precision auto loading rimfire gun build

I had a chance to test out some new gear over the last few days as I prepare a rifle for prs rimfire competitions
PRS Rimfire rifle at the bench fot testing
ACTION:
 a Magnum Research
       Magnumlite  billet aluminum reciever
Perfectly machined a beauty in its own right.
Magnumlite action 
BOLT:
   After looking at many aftermarket bolts I came to realize that the engineer at magnum reaserch had done their home work
The headspace was cut perfectly on the breach face to .003" clearance .the exact number I try to hit when blue printing a bolt.
The firing pin is pinned up front for consistancy in ignition and reliability
The nice feature is the firing pin stop preventing barrel and chamber damage in dry fire.
All in all this is the most well thought out bolt I've used!
Magnum Research Bolt
TRIGGER:
Kidd 2 stage set at 6 oz overall I can't say enough about this trigger clean crisp consistent breaks like glass .
Kidd trigger
BARREL:
  Here is the challenge keep the front of the gun
Light enough for off hand use while Keeping the barrel stiff enough for hard use. All the while Keeping barrel vibrations down for repeatable accuracy.
A big challenge for sure.
After talking with several barrel makers  of the usual suspects i came to the conclusion that I needed a carbon wrapped barrel.
I had the right barrel on tap and after assurances from the factory engineer at Magnum Research  I special ordered  a graphite carbon wrapped barrel at 20 inches with 1/2×28 threads.
Jim explained  that there factory barrels were built using match quality  blanks and specially chambered to match standards .
Ive had a long standing relationship with Magnum Reaserch for speed shooting so I trust Jim's wisdom in all things 10 22 patern rifles . I didnt realize just how good they are at distance !
Magnum Reaserch Barrel 
MUZZLE BRAKE:
    I chose the SJC 3 port stainless rimfire .
I am a partner in SJC so its obvious i feel they are the best on the market.
The brake helps in recoil and muzzle rise using multiple directional thrust vectoring technology. There is zero movement!
Sjcguns.com Rimfire brake
3 port stainless 
STOCK:
 For this build i chose the new McMillan A5 rimfire stock!
A real beauty! The inletting  fit and finish are well worth the wait  of 6 months! Im hoping that McMillan will introduce this stock to there retail store as a ready item for purchase!
The perfect stock for prs rimfire competition
BYPOD:
  Harris of course . The standard in bipods
McMillan stock and Harris bipod
  For this rifle i looked thru the nightforce catalog and ordered up there new 4 to 14 x50mm shv F1 OPTICS:
Thats a mouth full to say ! For good reason as this scope is packed with featues!
Illumination
Front focal plane allows precise hold overs at any magnification using the reticle.
Return to zero feature that lets you come up on your dial without fear of loosing your place.
Covered windage cap a great feature in competition or hunting being on the side and out of site . Protects your windage adjustment from getting bumped.
I added some items to finish off the build
The level in the top ring helps me keep the crosshairs level .
The angle gauge allows me to know my exact target angle necessary for calulations at long range .
The throw lever makes magnification adjustments fast and precise.
NightForce has realy done there home work with this scope! The perfect scope to play out to the limits of the 22lr cartridge.dont get me wrong i have one waiting on my new hunting rifle . Perfect for any aplication where speed and accuracy are needed.
I hope they will add a 5 to 25 x56mm F1 to the line up of SHV scopes for my bigger guns!
To shoot a mile.
 CHEEK RISER:
     On this build to get into perfect eye alignment to make use of the accuracy of this rig I chose the tacpro adjustable riser .
 Simple sturdy reliable! Does the job and looks good on the gun.

AMMO:
AGUILA Super Extra Standard Velocity 40 gn.
Consistent accurate   inexpensive. All features you want when practicing for any competition

In conclusion as the pictures demonstrate this rifle lives up to its potential with amazing accuracy . Soft recoil and surprisingly light wait.
The groups were shot at 50 yards outside .
The average group was 1/2 inch on centers with the best measuring .278 inch on centers.


All groups were tenshots. Puting that into perspective this gun put 30 rounds inside a quarter . Im very impressed to say the least!
This was the high end of a rimfire build with no regaurd for budget  it took just under a year to get it to this point!  Stay tuned for my next build
Long-range on a budget
I had alot of help from the industry  partners I have
Thanks a bunch!
John Nagel
Owner sjcguns.com
SCSA 3 Time  Grandmaster
Aguila  Ammunition, Magnum Reaserch
NightForce
Pro staff shooter
30 plus state and regional titles in various disciplines
8 time metal winner  in World and National events
2016 East Coast Steel Challenge Rifle Master







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