338 EDGE Reamer design given H4831?

Discussion in 'Gunsmithing' started by Machann, Feb 3, 2013.

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  1. Machann

    Machann Active Member

    Aug 23, 2011
    Hi Guys

    I’m posting this here given the amount of knowledge that is floating around on this forum regarding the 338 EDGE. Been a lifelong dream of mine to build a long range rifle and I have decided on the 338 EDGE after numerous hours on Quickload and reading up on it.

    We are blessed with game here in Africa but not with firepower and components :-(. One unique problem I’m faced with is that I’m limited to two powders for the EDGE. These include S385 (Somchem) which closely resembles H4831 (Hodgdon) and B12.7 (Somchem) which is ball powder with a little slower burn rate compared to H870 (Hodgdon) with H1000 (Hodgdon) almost between them. I’ll be using S385 behind 250gr and 300gr Bergers.
    I’m looking at four possible measures to reduce the pressure in order to increase the powder filling ration and possibly gain a little velocity. The first two is moly goat the bullets and the use of barrel such as the Broughton 5C. The other two is seating the bullet as deep as possible and to perhaps look at a pressure reducing throat design. Yes I have gone through a lot of trouble, money and time to try and import one of Shaun’s 338 EDGE +p without luck.

    Can you guys perhaps assist with the design of a reamer given:
    The Berger bullets seated as deep as possible ( Is this a COL of 3.850 or can I go shorter)?
    An optimum jump length if there is perhaps something like that for the Hybrid Berger’s?
    Perhaps a throat configuration I could consider while respecting the work done by guys lick Shaun and Allen?
    Other reamer consideration?
    Perhaps a prints I can work from and tweak?
    Other consideration you would suggest given something like H4831 behind the Bergers?
    Also, who are the best guys to approach with the reamer design to have it manufactured?

    I would really appreciate some input and help from the guys that have experience with this calibre.

  2. J E Custom

    J E Custom Well-Known Member

    Jul 29, 2004

    I recomend that you contact Dave Kiff with PT&G . he will assist you in this and furnish a drawing
    also he can make the reamer (he may have the reamer in stock that you want).

    Also Dave Manson with Manson reamers is another sorce for a custom reamer and a good guy to
    deal with.

    I use both of these guys and have no issues with them or there reamers.

  3. Machann

    Machann Active Member

    Aug 23, 2011
    Many Thanks!!!

    Have emailed both of them without any reply, but will try them agian.