338 Edge Reamer ?s

Discussion in 'Gun Project Questions & Gunsmithing' started by slugger3, Mar 15, 2019.

  1. slugger3

    slugger3

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    I building a single shot 338 Edge.
    When guys are building single shot 300 RUMs and 338 Edge's, how much longer than SAAMI are you normally setting up the reamer specs?
    I know PTG sells the standard SAAMI, but how about custom spec reamer rentals, or special orders?...
    How much longer than SAAMI are you guys going when you build a single shot 338 Edge?
    Thanks
     
  2. LA50SHOOTER

    LA50SHOOTER

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    I set mine up for the 230 gr. Berger Hybrid. - Bottom of bullet bearing surface just above the neck shoulder junction on a neck-turn chamber (0.369 neck, turning ADG brass to 0.014) Can still run 215 Hybrids, & 210's (VLD's & LR BT) and some others,
    - I wasn't aware that SAAMI had adopted/approved the 338 Edge.
    JGS Precision manufactured my reamer for me. My original design is based on 300 RUM brass necked up to .338 cal.
     
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  3. rhovee

    rhovee

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    If your building off a single shot 338 Edge then your over 4.0”. I would buy adg brass, 300 grain Bergers, and load a round with bullet seated in the neck. Give your self about .060 above neck should junction for seating depth. Send the dummy round off to
    Jgs. With ADG brass you don’t have to worry about doughnuts from necking up.
     
    Last edited: Mar 15, 2019
  4. slugger3

    slugger3

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    How much is the throat going to erode over the course of the barrel?
    If I set the original reamer up to be .060" above the shoulder/neck junction, will that be enough left to chase the lands as the barrel throat erodes?

    In my current 338 Edge (which I bought used), I'm at 3.033" BTO, and a COAL of 3.836" with 285 ELD-M's
    Right now with that Edge, the base (bottom) of the bullet is ~.405" below the junction where the flat portion of the case neck grabs the bearing surface of the bullet.
    And the flat bearing surface of the bullet is ~ .143" below the flat portion on the lower part of the case neck (Bertram brass 338 Edge)
    Thanks
     
  5. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    Get it throated to where you want. If you shoot it enough to have to chase the lands youll probably need a new barrel anyway. Barrels are a consumable like brass, bullets, powder and primers
     
  6. slugger3

    slugger3

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    No I'm playing dumb here...
    On a reamer spec sheet, it's the LEAD and the THROAT that I want to get pushed out to allow the bullets to seat longer, correct?

    So the junction where the LEAD ends, and the THROAT starts to taper down, is that the spot where the BTO (Base To Ogive) measurement is normally marked/measured to, on a loaded cartridge?
    Or...basically the point where the bullet touches the lands?

    Thanks
     
  7. slugger3

    slugger3

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    Any body out there who rents custom 338 Edge reamers?
     
  8. rhovee

    rhovee

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    I would just find a smith that already chambers a lot of 338 edge’s. They will most likely have a very good idea what the load will be close to. A couple that I know are
    Alex Wheeler and Rbros rifles and Defensive Edge. All are very familiar with edge.
     
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  9. GNERGY

    GNERGY Silver $$ Contributor

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  10. slugger3

    slugger3

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