New rifle design from ALLEN PRECISION.....

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Fiftydriver, Dec 11, 2008.

  1. Fiftydriver

    Fiftydriver <strong>Official LRH Sponsor</strong>

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    Now that the big game season is over, its time to get back to it in the shop and get rolling on turning projects out and getting them shipped. For the past year I have been working on a lighter weight version of my rifles based on the 408 CT parent case. My standard Xtreme Heavy Sporters come in at around 19.5 lbs ready to hunt with, scope mounted, rifle, bipod.

    I have made a couple of these rifles before but this is the first I have had the time to actually take pics of because the others were in such a rush to get out. The rifle is basically my Xtreme Heavy Sporter but I went to a dramatically different barrel design to reduce weight.

    Other major componants stay the same, BAT Model M 1.55" single shot receiver, McMillan A-5 stock, jewell trigger, steel pillar bedding and my APS Painkiller 5 port muzzle brake.

    This is however the first of these rifles I have made in a 375 Allen Magnum, the other two were 338 Allen Magnums.

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    The idea behind this rifle is to offer those that want a lighter weight extreme range rifle with ALOT of power or for those that want to hunt big game in Idaho which has a 16 lb weight restriction on a big game rifle.

    I had never been able to put one of these rifles on a certified scale to know exactly what it would weigh but with this one I was able to take it down to the post office and as you see it, ready to hunt, she weighs 16.1 lbs. I knew it would be close and it does just break the Idaho weight requirement. The rifle will also have another set of NF Ultralight rings on the scope so you will be looking at around 16.4 lbs with the two sets of rings.

    The good thing is that this rifle has the adjustable CP which is not required if you use a 50mm objective scope and mount it low as possible. The CP alone will add around 1/2 lb to the stock weight so right there, even with the NF scope and two sets of rings, you will be right at 16 lbs.

    If you want even lighter weight, one can drop to a Leupold Mk4 in something like their new 6.5-20x 50mm with the FFP reticle and your another 10 ounces lighter so you would be in the low 15 lb range with the rifle ready to hunt with.

    There are many rifles that are precision built for long range hunting that are this weight or less, that is not overly special, what is special is the chambering and reach available with this class of weapon. Nearly 9000 ft/lbs of energy in a rifle no heavier then many conventional varmint rifles and with recoil in the class of a 270 Win Sporter rifle.

    AND

    Without the need for exotic carbon wrapped barrels, Titanium receivers or Carbon Fiber stocks. We have been told these are all needed to get a rifle of this class into the 15 lb range, that is simply not true.

    This barrel is 1.350" diameter at the barrel shank for roughly 5" and then contours down to a muzzle diameter of 0.810" at a finish length of 30" which is plenty of barrel length in my 375 Allen Magnum. This bore size is MUCH less barrel length dependant then the 338 version but even at that, 32" is what I recommend and with that length and a Leupold scope, you can still easily get way under the Idaho rifle weight limit.

    In my opinion, the Titanium receivers are more hype then function if your looking for legit weight reduction. They are difficult to make, very expensive and really, just not needed.

    I also checked this barrel contour for stiffness compared to a 1.350" barrel shank ABS carbon fiber barrel. With the barrel mounted in the chuck by the first two inches of the shank, I took a 10 lb weight and suspended it off the muzzle end and measured the flex in the barrel. The Carbon fiber barrel flexed 40% more then the all steel fluted Lilja barrel inspite of being nearly 0.200" larger in diameter at the muzzle then the all steel barrel.

    Now this is not a hammer on the ABS barrel, it just goes to show that a smaller diameter fluted all steel barrel is stiffer and more rigid then a much larger diameter carbon fiber barrel. WIll the ABS barrel have a longer barrel life, maybe but they also cost $900 for a single barrel and I can get two of these fluted all steel barrels for nearly the same price.......

    Carbon fiber shell stocks are great. Manner makes some great ones that would drop the rifle weight even nore with no real increase in price compared to the McMillan stock.

    Point being, these rifles are expensive but there is no need to get REALLY exotic and expensive to get this class of rifle into the 15-16 lb range. Again, thats not bare rifle weight, thats rifle, rail, two sets of rings, NF scope and bipod, ready to hunt.
     
  2. Michael Eichele

    Michael Eichele Well-Known Member

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    All I can say is wow!

    I think I just ruined another keyboard from all the druel!

    $$??
     

  3. ICANHITHIMMAN

    ICANHITHIMMAN Well-Known Member

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    Great Kirby you realy now what guys want
     
  4. eddybo

    eddybo Well-Known Member

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    That is sweeeet.
     
  5. ss7mm

    ss7mm Writers Guild

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    Great looking rifle Kirby!!! First class all the way as usual.

    That looks like something that would be a pleasure to crawl in behind and break a few on a nice sunny day.:)
     
  6. timl

    timl Well-Known Member

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    That is a beauty. Can you tell me the colors and percentages on that stock? It looks great with the stainless action and barrel.
     
  7. trueblue

    trueblue Well-Known Member

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    Kirby,
    Which scope do you have on it, 5.5-22 NXS or the 8-32 NXS ?
     
  8. mkg

    mkg Well-Known Member

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    Ahh ... Honey, this is what I want for Christmas .

    That is one outstanding piece of hardware/artwork...... Thanks... drool...slober ... weep

    Mike
     
  9. huntinco

    huntinco User

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    Kirby, how has accuracy been on this rifle?
     
  10. Fiftydriver

    Fiftydriver <strong>Official LRH Sponsor</strong>

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    Timl,

    Color is 80% black, 10% gray 10% white
     
  11. Fiftydriver

    Fiftydriver <strong>Official LRH Sponsor</strong>

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    Trueblue,

    Its the 5.5-22x 50mm NXS
     
  12. Fiftydriver

    Fiftydriver <strong>Official LRH Sponsor</strong>

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    Huntinco,

    I have not tested this rifle for accuracy yet. The two I have built in 338 AM were very accurate. Tested them at 1300 yards and both were easily in the 3/4 moa range before complete barrel break in.

    I would say that compared to the standard weight Xtreme Heavy Sporter, there is no real accuracy difference but there is a shootability difference. Both rifles are great shooting and easy to shoot but the standard weight XHS acts as if it shoots itself. That is a strange comment to make but its true.

    With the lighter weight rifle and with any lighter weight rifle compared to a heavier rifle, there is more piloting on our part to make the rifle shoot.

    I will say that at extreme range, that being +1000 yards, the heavier rifles seem to be a bit more consistant but I have yet to see anything worse then 3/4 moa at even these ranges with the light rifle. I am not saying the rifles would not do 1/2 moa, I am saying on that day, I was not a 1/2 moa shooter.

    I do not know how either shoot at 100 yards, I could care less about that and do not even test this type of rifle at that range, no point in it.
     
  13. Booney

    Booney Well-Known Member

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    Hey Kirby I was just wondering why you did not use your new APS Hybrid throat design. My guess was muzzle blast, but I was not sure. My next question is what bullet are you shooting out of your 375? I want to have one built but I am concerned with bullet avalibilty, Whereas the 338 will always have the 300 smk.
     
  14. Fiftydriver

    Fiftydriver <strong>Official LRH Sponsor</strong>

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    Booney,

    I only have the Hybrid Throat reamers for the 7mm and 338 at this time, no 375 yet.

    I am using the 350 gr SMK. If the new 300 gr Accubond would get out on the shelves, it would be a viable lightweight option as well but not nearly as high of a BC. The 350 gr SMK in 375 has nearly identical BC as the 300 gr SMK in 338.

    And can be driven to basically the same velocity as the 338 AM. Just with a heavier kenetic energy payload, a bit more recoil as well but nothing serious.