270 win & H4350

Discussion in 'Reloading' started by trailrider121, Nov 2, 2010.

  1. trailrider121

    trailrider121 Well-Known Member

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    Working on a load using H4350 with 130gr GMX bullets for my 270 win. Plan on using Winchester brass, and I'm interested in using H4350. Anybody using H4350 with 130gr bullets? Have any recommendations? Looking for something over 3000 fps.
     
  2. DANNY-L

    DANNY-L Well-Known Member

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    I've never tried h4350 but have seen it listed,I started useing imr4350 20yrs ago and never found the need to try others. You can hit the 3000fps your looking for from the imr w/very good accuracy.
     

  3. Gene Jr.

    Gene Jr. Well-Known Member

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    I've not tried 4350 in the 270 but have had very good luck with H4831sc and 140gr AB at 3050fps. I've used 4350 with good success in the 243win so it would certainly be worth a try.
     
  4. Derek M.

    Derek M. Well-Known Member

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    I've had remarkable success with both IMR and H4350 in terms of accuracy but have never clocked the loads. I've had equal success with 4831s in both brands. I think generally speaking you will get better velocity with 130s and 4831. Curiously, I think I recall a Speer manual listing 7828 with a 130 bullet as their top speed powder.
     
  5. Shortmagman

    Shortmagman Well-Known Member

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    I have burned quite a bit of powder in a 270 Win.. I have tried many different powders and yes I have used H4350 with 130 grains bullets even though I have not loaded the GMX's.

    One of my best loads with H4350 is Hornaday's 130 grain Interbonds, shooting 54.0 grains of H4350 in WW cases and WLR primers I am able to get an average of 2968 ft/sec and my best accuracy with this bullet. I did go to 55.0 grains and I was able to get over 3000 ft/sec but I lost my accuracy.

    From my experience if you want more velocity H4350 probably is not the best powder. You need something a little slower, such as H4831, RL-22, or in my case N165. My highest veloctity has been achieved with Magpro and with the 150 grain bullets IMR-7828 is a great choice.

    For both accuracy and velocity it is almost impossible to beat H4831.
     
  6. trailrider121

    trailrider121 Well-Known Member

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    Thanks for the replies. I guess I'm going to work with H4350, if I dont see any accuracy with it, then I'll try H4831SC or RL-22. the problem come is the the GMX bullet is so long that any powders the fill the case up becomes an issue with seating the bullets. They become a very compressed load. I do a few rounds and see what my outcome is. If not, Then proceed with other powder as mention.
     
  7. Ozzie

    Ozzie Member

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    I have used H4350 exclusively in my two Browning White Gold Medallion .270s for awhile now. One of them has a 22" Lilja #5 contour while the other still carries the factory barrel. Since I'm from California I shoot 130 gr. TTSXs in them but I like that bullet so much that I use it everywhere I hunt. The H4350 is the most accurate powder in both guns - better than both RL22 (which is a bit faster) and IMR4350 (which is close, but not quite as accurate). I see no reason to worry much about 50 or even 100 fps when shooting a .270 since I don't use it for truly long range shooting - I have a self-imposed 500 yard max - but 55.0 gr. of H4350 gets me 3,100 with .75 MOA all the way out. Honestly, what more could I ask?
     
  8. Ozzie

    Ozzie Member

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    Oh yeah - forgot to add: seating depth is way more important to accuracy in my guns than powder choice when shooting the non-toxics. If you're gonna mess around with the load, I'd advise spending most of your throat wear on that variable.
     
  9. Derek M.

    Derek M. Well-Known Member

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    My buddy has a 270 with a 24" Lilja. I am load testing with that rifle currently and the 150 VLD. We are getting in the high 2900s with that bullet wt. So, getting over 3000 with a 130 should be a breeze if the right powder/primers are used.

    By the way, don't forget Reloder 19. This powder accounts for many of my loads, and subsequently, many of my mule deer, whitetails, and a pronghorn, and about 8 coyotes!

    One 270 eats the 130 TSX with 57.0 grains Re19 and is 1" high at 100, and 1/4" low at 200. So, it's cookin.

    I won't own a 270 without Reloder 19 on hand.
     
  10. Ozzie

    Ozzie Member

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    Yeah, RL19 is an old stand-by for me too. Just not as accurate in my .270 rifles as H4350 - close but no cigar. That's a pretty stiff load you're pushing, too. I have a tight tournament chamber in my Lilja and that much juice craters my primers pretty good. I save the real barn-burning for my 7mm STW with a 28" Broughton 5c. If I'm gonna vaporize a bunch of throat, why not REALLY turn up the smelter?
     
  11. trailrider121

    trailrider121 Well-Known Member

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    Well I finally got around with trying some new loads out using H4350. I previously had a charge of 55.8gr, but after few outings i did not feel comfortable with it. After reviewing my targets I went with 55.0grs as ocw. So I loaded them up at .090, .080, and .070" off the lands.

    These were shot at 100 yards. The target with two holes were foulers at .070" as well.

    [​IMG]

    [​IMG]
     
  12. Clark

    Clark Well-Known Member

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    I am not at the point where different powders give different accuracy.

    I have tried H4350 with 117 gr 257 RAI, 260 139 gr, 338WM 250 gr, 7mmRM 162 gr, 300WM 168 gr, and 243 100 gr.

    So far there was more velocity than predicted in 257, about as predicted in 243, and less than predicted in the rest.

    I have not tried it yet in 270, but I may.
     
  13. Keith1

    Keith1 Member

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    My 24 inch barrel Remington produces 3134 FPS with 60 grains of RL 22 and a 130 grain Partition. Accuracy is also very good.
    Regards, Keith
     
  14. Reloader222

    Reloader222 Well-Known Member

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    4831 would give better results with heavier bullets and with longer barrels - otherwise I agree that H4350 is an excellent choice for the 130gr bullets in .270Win.