The Win M70. Just some pics.

LRI

LRI

Lance Criminal
Full Member
Minuteman
    • Mar 14, 2010
    6,342
    7,648
    53
    Sturgis, S. Dakota
    www.longriflesinc.com
    #1
    Accurized M70 the LRI way.


    Diamond hone receiver bore, 1st op. Gets the hole straight and taper free:

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20424141_1419141281513959_3466361238880693266_o.jpg?oh=30c1aaa7406b343ca147dfe5610a105c&oe=59F83425"}[/IMG2]


    Bottom of receiver finish machined so that its actually flat:



    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20369531_1417624014999019_8154588073661465854_o.jpg?oh=212bb15fcf113725b68837e4e61eb3a3&oe=5A30D0A7"}[/IMG2]

    Flatness inspection. Granite surface plate, Starrett height stand:

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20369616_1419141278180626_5110199261584941281_o.jpg?oh=3244794326a5a6a0f32eb78d6c47867b&oe=5A3127F9"}[/IMG2]

    Ready for Op3: Accurizing. Kitamura Mycenter 2x cnc vertical machining center.

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20414091_1417624064999014_2603500489611901899_o.jpg?oh=a11e69e924fe506be0eea79d10a0b980&oe=59F62A74"}[/IMG2]

    Setup for accurizing:

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20451590_1419141371513950_6553275522954610640_o.jpg?oh=b0b220496c052214fa9a2dd821a4a992&oe=5A2B08B0"}[/IMG2]

    Notice that the front ring of the action is not held onto. It's completely free and unbiased from the the fixture. NO distortion of receiver ring from "Cats Head" screws, collets, etc. Helps ensure the part stays error free.

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20423992_1419141378180616_8955578764116114605_o.jpg?oh=5e7b8b6585e64c7bb05bd388d6b3d2ce&oe=59FF4790"}[/IMG2]

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20369769_1419141408180613_3687190481253406912_o.jpg?oh=3944002568ec7b962150e3503a4ee6e6&oe=5A2FB76B"}[/IMG2]

    Post machining and why we do it this way:
    • 1-1/16-18tpi threads
    • Higbee cut lead thread
    • Resurfaced front ring
    • Resurfaced lug abutments
    • ID cylinder bored to thread minor
    • Thread milled receiver threads
    • Gauged threads
    • Stepped recoil lug to simplify pillar bedding
    • 8-40 scope base hole option in same consolidated setup ensures position accuracy (optional service)
    • Clip slotting for lugged LRI made base (optional service)
    • Consolidated tool package to reduce tolerance stacking
    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20626153_1425113127583441_6764113157194861150_o.jpg?oh=de6cd9cf4761817e01db68316bc53433&oe=59F2D17E"}[/IMG2]

    Adding 2.5* draft angle to forward side of lug. Eases chewing on bedding during removal. Hardinge HLV tool room lathe.

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20615972_1425113404250080_7133297854967833783_o.jpg?oh=aeaea31017306425ffac423eee32943c&oe=5A2F6068"}[/IMG2]

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/scontent-ort2-1.xx.fbcdn.net\/v\/t31.0-8\/20643251_1425113500916737_9098620861411869608_o.jpg?oh=55610da65288110b5ccd00b9150addbf&oe=59F40B51"}[/IMG2]
     
    Last edited:
    #3
    Standard rate is $275 and includes the fundamental bolt work. Our looming GB will chew on this price. I still have to gather pics of bolts in process.

    I have a new machine on order. It's due to arrive later this month. Once its on the floor and running, we'll powershift this offer into gear. (hopefully we miss neutral and reverse, lol)

    Thank you for the interest. Tell a friend!



     
    #6
    good stuff, i am wondering what you do with the barrel threads and bolt being crooked from the sear

    do you completely machine off the old threads and cut new ones or what? how about since the sear pushes the back of the bolt towards the top and creates slight misalignment, do you take that into account when machining the back of the bolt lugs and bolt face?
     
    #7
    FrankieJames7 said:
    good stuff, i am wondering what you do with the barrel threads and bolt being crooked from the sear

    do you completely machine off the old threads and cut new ones or what? how about since the sear pushes the back of the bolt towards the top and creates slight misalignment, do you take that into account when machining the back of the bolt lugs and bolt face?
    Click to expand...


    Yes, old threads gone. The whole sear/lug alignment thing has been argued and debated for as long as I've been tinkering with rifles. The founder of Defiance is also the founder of Nesika. "Borden Bumps" were supposed to solve this "problem". They are part of Nesika bolts, yet they aren't on Defiance actions.

    If it's so good, why not? I've yet (in 20+ years) seen a single documented case/test where this has been conclusively proven.

    At one time more NRA Highpower Camp Perry Championships were won with M70's than any other manufacturer. I'd bet a $100.00 none had bolt bushings. . .
     
    #8
    Oh man. I have been debating having my m70 accurized. My fav action after the accuracy international actions. My current m70 is a classic and had a slight feeding issue which is apparently common to certain s/ns. Apparently there is a slight scallop in one of the guide rails which the bullet can nose dive into
    so what I am hearing is buy a cheap m70 crf for the action and send it to you! Really glad you are offering g this, I think it's a fantastic action for a custom rifle.
     
    #13
    Supersubes said:
    Chad, just noticed something. Why cant the front of the lug (draft angle) be done in the mill as well? Just curious.
    Click to expand...


    It could I guess, but it's easier to do it in the lathe. Faster setup. Hardinge tool room lathes are about as fast as a lathe gets short of automation. Very handy little machines. I'd rather play with dull razors in a busy street than do work like this on a conventional gap bed machine. X1000 if it has a open jaw scroll chuck on it. (hate em!)

    The other advantage is on the lathe the width across the face at the center is heavier. The lathe ends up machining an arc where's the mill would create a flat. Nice to have as the edges generate a natural relief angle as it's pulled out of the stock. The added material in the middle is nice as it keeps the part stiff. -not that it needs to be anywhere near this thick, but whatever.


     
    #14
    LongRifles said:
    It could I guess, but it's easier to do it in the lathe. Faster setup. Hardinge tool room lathes are about as fast as a lathe gets short of automation. Very handy little machines. I'd rather play with dull razors in a busy street than do work like this on a conventional gap bed machine. X1000 if it has a open jaw scroll chuck on it. (hate em!)

    The other advantage is on the lathe the width across the face at the center is heavier. The lathe ends up machining an arc where's the mill would create a flat. Nice to have as the edges generate a natural relief angle as it's pulled out of the stock. The added material in the middle is nice as it keeps the part stiff. -not that it needs to be anywhere near this thick, but whatever.
    Click to expand...

    Thanks for the explanation!

     
    #18
    Just a thought but if you offered this like the 700 GB I think you'd have a lot of interest.

    Additionally, if you had an option for lengthening long actions magazines so people could get max coal out of there m70's it would be awesome.
     
    #21
    Edds said:
    I think I've read your comments saying you didn't think it was important to true the bore on a Model 700 receiver. Why is a Model 70 different?
    Click to expand...

    Your right, I have said that. I'm not "truing" the bore for the sake of making it true so much as I am to improve the surface finish and get rid of any/all taper, and to improve the roundness of it. I'm also enlarging it when needed to avoid "spinning" the bolt for Cerakote clearance.

    Were talking very, very small values here. Not the reamed bores some have been doing.


    The other reason will come later...not ready to cut "that" part of it loose yet. :)



     
    #22
    Lunchbox27 said:
    https://www.snipershide.com/shooting/forum/...t-your-engines
    Click to expand...



    It's going to parrot the M700. No need to reinvent that wheel at all. We are also going to tie this into the store. The web guy is due to come by, he'll copy/paste the M700 into the M70 so that its completely paperless. Doing so on the M700 has made it so, so much nicer. We can work instead of making phone calls and chasing money. That has been the single biggest leap in getting our lead times down to the absolute best in the industry.

    There will also be some new things that come to be with this. More on that later. . .

    A fully tuned barreled action turn key with ALL the widgits we offer in less than a week. Unheard of.
     
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