Gunpowder VihtaVuori N150.

Discussion in 'Reloading' started by kristian55, Jun 15, 2010.

  1. kristian55

    kristian55 Active Member

    Messages:
    31
    Joined:
    Aug 10, 2009
    Hi.
    What load of gunpowder VihtaVuori N150 it is needed to utillize for achievement speed 2400fps-2900fps?
    Bullet 180gr.-200gr.-220gr.-240gr..
    Barrel/cal. 30-06 , 22" (steel 4140)
    Your recommendations.
    Thank you for an answer,
    Kristian.
    P.S.
    Gunpowder VihtaVuori N150 N150 - 8lb - N150-8 by: Vihtavuori - Vihtavuori-Lapua.com near on properties to to IMR 4350?
    I plan to utillize bullet 65G , 65C and 65B
    http://www.woodleighbullets.co...llet List 3.html
    and
    bullet 308177HV198
    GS CUSTOM BULLETS - Specifications for use
     
  2. justgoto

    justgoto Well-Known Member

    Messages:
    636
    Joined:
    Apr 11, 2009
    My Hornady manual lists VIHT n-150 for the lighter bullets, 150gr and below. It suggests using, VIHT N-160 for the heavier bullets.

    It has the two powders listed for the lighter bullets (IMR 4350 and VIHT N-150,) with a 5 grain difference in charges.
     
    Last edited: Jun 15, 2010

  3. kristian55

    kristian55 Active Member

    Messages:
    31
    Joined:
    Aug 10, 2009
    Hi.
    I am in a position to apply only the gunpowder of SUNAR it is an analogue VIHT N-150 ,-initial weight of gunpowder for heavy bullets from 45gr.+.
    http://gsgroup.co.za/burnrates.html
     
    Last edited: Jun 15, 2010
  4. kristian55

    kristian55 Active Member

    Messages:
    31
    Joined:
    Aug 10, 2009
    My calculations:
    I knowing that limits SAAMI specifications for the rifles of caliber 30-06 make ANSI PSI 60.000 - ANSI CUP 50.000
    for 300Win.ANSI PSI 64.000 - ANSI CUP 54.000.
    I put a question about high and critical speeds which can be utillized for a barrel/cal. 30-06 , 22" (steel 4140).
    PSI 60.000 - 4218.42 at. coming from that critical pressure is in a barrel- I put a question about high and critical speeds,-coming from that critical pressure is in a barrel/cal. 30-06 , 22" (steel 4140)-4218.42 at..
    E(max. and critical)=mv2/2
    For example:
    for a bullet which I want to utillize CGC Bullet .308" 177gr HV on barrel/cal. 30-06 , 22" (steel 4140) stalling speed will be 2805.12ft/s
    at critically maximal pressure PSI 59786.4.