Is H335 too fast for 300 WIN MAG?

Discussion in 'The Ammo & Reloading Forum' started by The Count, Oct 24, 2012.

  1. The Count

    The Count New Member

    May 29, 2010
    I use H335 with pretty good success (less than 1/2 MOA at 100Y) in my .223 and 308. Just bought myself a Rem 700 stainless in 300 WM. Can't find any loads using this powder. Is it just way to fast for the larger cartridges?
  2. Bindernut

    Bindernut Well-Known Member

    Oct 24, 2007
    ND, USA
    H335 is pretty fast burning for a large-case like the .300WinMag. It's pretty identical in performance to Reloder15 and IMR3031...too fast a burner to get peak velocity before you start running into high pressures.

    I don't load for the .300, but occasionally for the 7mmRemMag which is reasonably close in case capacity and bore diameter.
    For the .300WM, I would probably stick with H4831, RL19, RL22, or something in that range. RL22 is a good performer for me in the 7mmRemMag.

  3. JLA

    JLA Well-Known Member

    Feb 26, 2007
    Heart Of Texas
    Prolly be ok for reduced loads. But to answer the Q.. yes too fast.. Save it for the .223s and .308s stuff the big .300 with H4831SC.. One of my fav mag rifle powders.
  4. langenc

    langenc Active Member

    Oct 23, 2009
    Montmorency Co, MI
    I believe the new RELODER 17 was made for magnums, esp short fat ones.

    We use RL 19 in my sons 300 WSM w/ very good results. At the time we started loading for it, RL 17 was not even born yet.
  5. myfriendis410

    myfriendis410 Member

    Mar 30, 2011
    Lompoc California
    Yeah; but in the win mag RL19 and RL22 are both right in the sweet spot. H4831, IMR7828 etc. No way would I look at loading H335 for that cartridge.
  6. Bindernut

    Bindernut Well-Known Member

    Oct 24, 2007
    ND, USA
    To my mind (I prefer loads with slow-burning powders with as near to 100% density), RL-17 is a bit fast for the large-case magnums. I prefer the RL-19 & H4831 range too.

    RL-17 is in the "4350" range on the burn chart. Alliant has never had a powder similar to IMR or Hodgdon 4350, RL-17 finally fills that gap. I haven't tried it yet, but it is on my options list for a few smaller cartridges.

    If you prefer a faster burn rate, then RL-17 or any of the 4350s will work for the .300WinMag.
  7. The Count

    The Count New Member

    May 29, 2010
    Thanks for the tips. I also came across a load table from IMR for their Trail Boss powder for rifles. They even have loads for the 300WM. I whipped up a dozen rounds with 20 grains of TB under a 150 gr. Hornady spire. Talk about a mild load! Sounds like a 223 out of a suppressed rifle. Lots of fun for target shooting. Saves your barrel from a premature death also. Decent accuracy, around 1 MOA at 100.
    Last edited: Nov 1, 2012
Similar Threads
Forum Title Date
The Ammo & Reloading Forum H335 and BLC-2 issues using Jan 10, 2017
The Ammo & Reloading Forum Hodgdon H335 Warning Sep 8, 2016
The Ammo & Reloading Forum H335 for .45-70 JSP 405 gr. ? Apr 29, 2015
The Ammo & Reloading Forum H335 powder or winchester powder Feb 5, 2013
The Ammo & Reloading Forum H335 Powder Dec 31, 2012