300 wsm powder

Discussion in 'Reloading' started by speeders, Feb 9, 2013.

  1. speeders

    speeders Well-Known Member

    Messages:
    100
    Joined:
    May 25, 2005
    I worked up a few really quick loads and went to the range yesterday. I had some IMR 4350 and IMR 4831. The 4350 was ok and groups were right at 3/4 in to 1.5 inches. I started out low and worked up to max load. Max load produced the best group.

    I then shot 4381. I tried 65.5 grains to start and worked up to 66.5 grains before I ran out of time. 65.5 grains produced a 0.705 3 shot group at 100 and the 66.5 gr shot 0.590. I am still gonna keep adding slowly as I am still 1.5 grains from max.

    Both loads were seated to max magazine length. 2.860

    My concern is these powders sound like they are fairly temp sensitive. In Alberta, I hunt from +30 C to -30 C.

    Should I worry about the IMR powders. This gun is going to be set up for shooting 800 to 1000 yards.

    Im shooting a168 grain BT. As far as Hogdon powder what have guys had the best luck with, h4350 or h4381?

    Thanks in advance
     

    Attached Files:

  2. D.ID

    D.ID Well-Known Member

    Messages:
    838
    Joined:
    Dec 24, 2008
    I love h4350 in mine but can not personally say how the imr compares. With h4350 from -10f to 110 it has had a little fluctuation at the high and low but it has bean very minor. From 20-90 I do not even think about it, but I don't shoot that one past 900 typically either.
     

  3. varmintH8R

    varmintH8R Well-Known Member

    Messages:
    1,123
    Joined:
    Dec 12, 2011
    From what I have read, the IMR extruded powders are slightly more temperature sensitive than the Hodgdon Extreme powders, but not nearly as bad as your typical ball powder. I shoot IMR4350 in my 300WSM behind 168gr TTSXs, and have not seen major differences in POI. I am not shooting at 900+ yds though.

    I have also worked up some loads using H4831sc. Seems to shoot OK but not as accurate as IMR 4350 in my rig.
     
  4. jfseaman

    jfseaman Well-Known Member

    Messages:
    3,651
    Joined:
    Apr 8, 2012
    H4350.
     
  5. .284

    .284 Well-Known Member

    Messages:
    220
    Joined:
    Aug 14, 2009
    I have always been able to make 300 wsm's shoot with rl19.
    I have just tried h4350 and h4831sc for the temp reasons. 4350 shows pressure for me with 175's with fairly low charges but great speed where as the 4831 is compressed and a bit slower at 2950ish but very low es.
    I have only crhonied rl 22 in summer and winter with a257 wby mag and found about 100 fps spread
     
  6. baldhunter

    baldhunter Well-Known Member

    Messages:
    446
    Joined:
    Jun 18, 2008
    I've shot Win.760,Relooader-17,IMR-4350,Ramshot Hunter and Reloader-22 in mine.As you can see,that is a wide range on the powder burn rate scale.Any of these powders are capable of delivering exceptional accuracy,where they stand out is when they give you both accuracy and velocity.In my 300 WSM,Win.760 does it.
     
  7. jfseaman

    jfseaman Well-Known Member

    Messages:
    3,651
    Joined:
    Apr 8, 2012
    H4350 is


    • consistent lot to lot
    • Less than 1fps per degree temp stable
    • Fast: with 208 A-Max my 'hot' load is 2887fps, slow load is 2720.
    • Consistent shot to shot, using my Magnetospeed chron, 5 shot strings: SD=4 for that hot load. The slower load SD=3
    • Accurate: Sub-Moa out to 700yards, that's the farthest I have at the moment. 100yards does not mean much with this big bullet. My zero is 300 with 1.125 group recorded. I've improved my shooting since then.

    I have 400 down the pipe, a 28" Pac-Nor sendaro.

    IMR-4350 is not a good substitute for me. acceptable but not preferred.

    I have tried RL17, RL19, RL22, IMR. Nothing works as well as H4350 for me. That is the same for my 260 Rem as well.

    I am trying H1000 and H4831 so that I can stretch my H4350.

    H1000 is only for heavies. Fast without pressure but max case capacity gets an SD=4 at 2745fps.

    WAIT - I shouldn't be telling you this. It's hard enough to find H4350.
     
  8. jfseaman

    jfseaman Well-Known Member

    Messages:
    3,651
    Joined:
    Apr 8, 2012
    Don't use magnum primers.
     
  9. D.ID

    D.ID Well-Known Member

    Messages:
    838
    Joined:
    Dec 24, 2008
    "WAIT - I shouldn't be telling you this. It's hard enough to find H4350."

    I use mag primers in mine. ..... Its the old question that nags at all of us, If I recommend my gunsmith he will be busier next time I need him, If I tell someone how great the best little known secret is, it will be better known and not so secret anymore. Ah, the conflict in every human heart, but what choice do we really have?

    Savage rifles, H1000, varget and h4350 suck and are totally useless, cci primers never go bang, Berger and seirra make lousy bullets, Ross's brakes do not reduce recoil and the 338 caliber is the worst caliber ever. Choates new tactical stock is flimsy. You guys should just stay away from all that stuff................Think anyone is going to buy that?:D
     
  10. BountyHunter

    BountyHunter Writers Guild

    Messages:
    4,803
    Joined:
    Jun 13, 2007
    Ten plus yrs and thousands of wsms down range

    F210 and H4350 or Norma MRP for 180-210s

    RL17 and f210s for under 180s

    Does not get any more complex than that
     
  11. speeders

    speeders Well-Known Member

    Messages:
    100
    Joined:
    May 25, 2005
    Well I had some win 760. Thought I had something there. Shot the first 2 in same hole and the third an in out. Tried 3 groups. Same thing

    Looks like Some h4350 is up next. I can't find ant RL 17 anywhere in these spots.
     
  12. Outlaw6.0

    Outlaw6.0 Well-Known Member

    Messages:
    3,007
    Joined:
    Feb 18, 2010


    lightbulb You beat me to it....


    I'm running RL-17 with the 168 TTSX, WOW is a pretty good way to sum it up.


    t