Mark V truing.

Discussion in 'Gunsmithing' started by Thescandinavian, Aug 4, 2019.


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  1. Alibiiv

    Alibiiv Well-Known Member LRH Team Member

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    Just curious about what cartridge is your rifle in? Also what are you planning on hunting with your rifle and at what distances are you planning to shoot your game at? Have you tried shooting this rifle to find out how it shoots? Or is it that you just want to mess with the rifle to make it custom?
     
  2. J E Custom

    J E Custom Well-Known Member

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    All of the Mark 5s that I have worked on have been excellent. There appears to be no loss of quality control In any locations manufactured.

    The norm is to reface the bolt face, square the receiver face and check the lug engagement to see if it needs lapping.

    I do this routinely just make it consistent. Many actions need this because they are thousands off in these areas. the Weatherby Mark 5s
    Are without a doubt the most precision action I have found and often need very little truing. I do it more as a way of getting fresh mating surfaces and normally only have to touch these surfaces to clean them up. Once they are set up, It doesn't make sense not to freshen up the surfaces and remove any high spots. (Many times I find some areas have less that .001 thousandths to remove) so if I were you, if truing is difficult to get done, with the history of quality of the Mark 5 you should be alright even though I recommend and do all actions.

    The recoil lugs are another area of great controversy. Some say they are hard to lap, they are not. in fact the way they are machined/designed they fit very well and require very little lapping if any. With close examination, it can be determined if they need anything. 80+ % engagement on each lug is better that most and only needs very little to reach 100%.

    There are lots of Gunsmiths that are not familiar with the Weatherbys so they don't want to work on them. Some even down talk them to avoid working on them. I build all of the big cartridges on them because of there strength and precision.

    I have nothing but praise for the big Mark 5 action and they make a beautiful custom rifle that shoots.

    J E CUSTOM
     
    bbckfh, Doublezranch, Alibiiv and 4 others like this.
  3. 30378wbymag

    30378wbymag Member

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    EXACTLY what J E Custom said!!!!

    I have two stock Weatherby rifles, both MkV's one is an Accumark in .30-378 the other is a Super Varmint Master in .243. BOTH rifles shoot unbelievably well. The only thing I have done is lighten the trigger pull.

    The 30 prints 200 yard .3's all day. These are 3 shot groups of course, not gonna wear out my hunting rifle barrel group shootin'. The .243 will shoot .2's with Factory ammo. This rifle sports a Zeiss 6.5-20x50mm and is a coyotes absolute WORSE freakin nightmare!

    For a stock factory rifle I can't see how you can go wrong with a Weatherby MkV!!!
     

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    Last edited: Aug 6, 2019
    436 likes this.
  4. 436

    436 Well-Known Member

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    30378wbymag,
    Spot on, I've had near the same experience with Weatherby MkV rifles from day one. .300 Wby, .240, .257, and .224, 22-250 These are Varmintmaster MkV's. The hunter that wants quality on a high percentage level can find it with Roy's rifles. I do love, the wood. :)
     
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  5. Thescandinavian

    Thescandinavian Member

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    They are two different things.

    Been shooting it in 7-300 since last September. Not as much as I'm planing and it probably shoots better than me.
    So far shoot 3deer with it and they where all quite dead and all within 100yards. No limit on how far I want to push it. Depends on how confident I would end up feeling with it.

    Probably shoots around the 1-2moa mark now only supporting the front. Contacted a gunsmith in here and was told that if it shoot 1moa I should just be happy and change to a something else if I wanted a true long range rifle. Guessing I'm leaving it untouched for now until I put on a 375 barrel or something for a Africa hunt.
     
  6. Alibiiv

    Alibiiv Well-Known Member LRH Team Member

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    My thoughts are that if I have a rifle that is capable of shooting better than me, I'd leave it alone period!!! And......I am sure that there are many on this forum who will attest to the fact that just because the rifle is rebarreled, and blueprinted it doesn't mean that the rifle is going to give the accuracy that they thought they would get by building a custom rifle. By this I am not saying that a custom build ought to give great accuracy, however that's not always the case. Also there's lots to be said about making precision ammunition, perhaps spending more money purchasing good reloading equipment might be an option for you.

    And to answer your question about truing an action? For me is yes I think that truing is worth the extra expense! If I'm building a custom rifle, I want to maximize the potential for the most performance that I can possibly get, so....yes I believe that spending the money to get a receiver blueprinted is worth every penny that I spend to get the action tuned. If this were not true I wouldn't spend as much or nearly as much to get the action blueprinted. I recently had two rifles built by a very reputable gunsmith. I told the smith that I wanted the action blueprinted; trued, action refaced, threads squared, bolt face squared, lapped lugs. His response to me was that he would check/measure the receiver to see what needed to be done and he'd do the work. He stated that the action that I was using, Ruger 77, oftentimes comes through not needing a lot of work; and, he specializes in working on Ruger 77s. This seems to fall in line with what J E Custom wrote about the Weatherby actions being one of the most precise actions that he's seen.
     
  7. JustMe2

    JustMe2 Active Member

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  8. Thescandinavian

    Thescandinavian Member

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    A solid will penetrate. A varmint bullet will hardly penetrate.
    A bullet that hit it's target below it's own design velocity might outpenetrate an identical bullet that are within its design parameters simply because it might not starts it's expansion. If you don't agree to this then I won't mind to disagree with you and you will really need to work hard to get me to change my mind. I will also need to be convinced or extremely bored if I'm gonna waste my time reading that article if it's stating anything like that.
    And as I say I don't see the point at shooting at anything if it's not gonna be hit with high enough speed for expansion to occur. If it penetrate deep don't matter much unless it provide a broad wounding that bleeds it out quickly.
     
  9. JustMe2

    JustMe2 Active Member

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    Scandinavian, yup, you understand now, expansion and penetration are inseparable.
     
  10. Thescandinavian

    Thescandinavian Member

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    They are still two different things that should not be mixed up. They have separate functions.
     
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  11. tmmcampbell

    tmmcampbell Well-Known Member

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  12. Frog4aday

    Frog4aday Well-Known Member

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    I like your question because I haven't seen many inquiring about 'accurizing' the Mark V. I liked J E Custom's reply because he works on them and has seen his fair share. If he says they are pretty good 'out-of-the-box' then it would seem you are fine with what you have. I mean, a Lilja barrel and a bedding job are farther along the 'accurizing' path than most have on their Mark V's.

    So the question that comes to my mind after reading your post is - HOW DOES YOUR RIFLE CURRENTLY SHOOT? That's what really matters. If you opened a box on a new gun, took it to the range and it shot 0.5" (12mm) groups at 100 yards (or meters) would you be asking, "Hey, should I have this worked on to be more accurate?" Heck no! You'd be thrilled. So...is your rifle not shooting well enough for you? Is that why you are asking?
     
  13. JustMe2

    JustMe2 Active Member

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    Tm you've got it backwards. The more the bullet expands or blows up, the less it will penetrate.