303 british

Discussion in 'Reloading' started by blackwidow, May 30, 2011.

  1. blackwidow

    blackwidow Member

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    just wondering if anyone has ever tried to reload 303 british with retumbo powder?
    my gun is no4 mk1* with 25 1/2 barrel shooting 180 gr seirra prohunters.
    my load right now is rl-15 43.7 gr at 3.05 overall giving me 2550fps. just wondering if retumbo might give me the same velocity with less pressure
    thanks -josh
     
  2. RT2506

    RT2506 Well-Known Member

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    Retumbo is waaaaaaaaay to slow burning for the 303 Brit. RL 15 works the best.
     

  3. blackwidow

    blackwidow Member

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    ok i was just checking. i have had 8 lbs of retumbo sitting there figured i would throw the idea out there. thanks!
     
  4. RT2506

    RT2506 Well-Known Member

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    Having 8 lb of Retumbo gives you an excuse to go out and purchase a big case magnum. Might I suggest a 264 Winchester magnum with at least a 26" barrel. For a factory built one a Rem. 700 Sendero comes to mind. Retumbo really makes my 264 Win mag scream. With 130 Nosler Accubonds it does 3350 fps with great accuracy.
     
  5. blackwidow

    blackwidow Member

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    i have the retumbo for my 375 cheytac that i had sent off to be rebarreled to a 338 snipetac. but the way finances are going im going to have to sell that when i get it back. i have thought about trying rl-17 in the 303 brit any one have any expirences with it?