Is there a downside to installing a Wyatt's Extended Mag Box?

Discussion in 'Gunsmithing' started by benchracer, Nov 26, 2012.

  1. benchracer

    benchracer Well-Known Member

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    I am considering the purchase of a new production Winchester Model 70 in .338WM. If I decide to go through with it, I intend to have a Wyatt's Extended Mag Box installed to allow me to load bullets like those offered by Cutting Edge and still be able to feed from the magazine.

    Is there a down side to having this done?

    Are there any issues regarding this that I should be aware of before I decide to go that route?
     
  2. benchracer

    benchracer Well-Known Member

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    I am taking the lack of response to my question as an indication that no one has had any problems related to having an extended mag box installed. I will proceed then , at some point, with my plans.
     

  3. HARPERC

    HARPERC Well-Known Member

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    No input but followed along as I have the same question. Hopefully bringing it back around catches the eye of someone who knows.
     
  4. Tikkamike

    Tikkamike Well-Known Member

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    I have had them put in several rifles that I have shot before and after and never seen any affect on accuracy good or bad. Although you are taking metal out so it is weakening the action to some degree. I have had it done in a 300 win 2 300 ultras and a 375 ultra. I would think if it were gonna be a problem I would have seen it in my 375
     
  5. HARPERC

    HARPERC Well-Known Member

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    Thanks Mike, I'm replacing the stock on my 338 RUM. I don't need the length currently but this is the 3rd barrel. Thinking maybe just do it all at the same time who knows what the future holds.
     
  6. Tikkamike

    Tikkamike Well-Known Member

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    3rd barrel ?? holy smokes there is going to be a lead and copper shortage if you dont slow down
     
  7. benchracer

    benchracer Well-Known Member

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    Thanks, Tikkamike, for your feedback.

    My concerns involve the amount of metal removed, smoothness and reliability of feeding after the modification, and the fit of the bottom metal after modification (hindsight, guess I should have stated that up front).

    I am glad to know that this modification has worked well in your rifles. I would have to agree that if you didn't have problems in your .375, the mod is probably pretty solid.

    Thanks again!
     
  8. Tikkamike

    Tikkamike Well-Known Member

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    glad to help. Feeding and functionality are no different from the factory set up. I like the Mod and will continue to do it
     
  9. HARPERC

    HARPERC Well-Known Member

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    LMAO, you got to remember its a 1941 action!
     
  10. highridge1

    highridge1 Well-Known Member

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    I have had great success with the wyatt box in rem 700's but have heard of feeding problems in model 70's
     
  11. Hookturnr

    Hookturnr Well-Known Member

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    As for fit, finish, functionality, I have no problems with this mod. Now, I have a philosophy of K.I.S.S. and it's just something else to go wrong. I have one on my 300RUM and it is nice but I have also found I can load the heavies in it at about max mag length and still get superb accuracy. I used standard BDL BM on my 280AI to eliminate the possibility of forgetting or losing a magazine in the mountains and finding myself bareassed up there. I'd like to say it will never happen but I have seen it happen personally both ways so I chose to eliminate that possibility with my next build. Just something to consider...
     
  12. mindcrime

    mindcrime Well-Known Member

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    Installed one on my Darrell Holland built LR 6mm Ackley (1-7" Lilja, flinging the 107 Sierra easily into 1/2 MOA AT 1K!) on a Rem700 short action. VERY PLEASED that now I can seat the bullet out to match the cartridge capacity, instead of using the 243/308 length, PLUS Kevin (the owner) is a great fella to do business with! Highly recommended for those LONG cartridges, short or long action! :)