270-300 Win Mag now feasible

Discussion in 'Long Range Hunting & Shooting' started by Big Jake Duke, Jun 12, 2015.

  1. Big Jake Duke

    Big Jake Duke Well-Known Member

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    Ill check if it is good for 1-9. I know 1-10 is out

    If so ill get some to you. Pm me your address just incase
     
  2. CogburnR

    CogburnR Well-Known Member

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    I am interested in trying out a few of those. 135g .... whew. That out to wind up the chrony.
     
  3. Big Jake Duke

    Big Jake Duke Well-Known Member

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    pm me your address 1-9 will work
     
  4. Longtooth32

    Longtooth32 Well-Known Member

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    This may be an odd question...but what does the bullet manufacturer want to know? Accurate at speed? How far off the lands? What powder? Expansion at slower velocities? I have lots of freebore in my 270 Wby...What is important to the bullet manufacturer?

    I have posted this before...a 140gr SST way far off the lands @ 3630fps (magneto speed)...three rounds... 1-9 twist, 28" barrel...



    The 135gr bullet should be close to 3700fps...?
     

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  5. Big Jake Duke

    Big Jake Duke Well-Known Member

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    yes and yes.

    pm me your address
     
  6. Big Jake Duke

    Big Jake Duke Well-Known Member

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    I played it safe on loading the 135gr CEBs

    I used 75gr Retumbo. They Chrono-ed at 3400 with more room for exploration. They did shoot into a .625 group. The next day we tried a ladder test in the desert- beset by gusting winds from 12-19.

    That was just frustrating.

    So I am going to push the envelope with the next batch

    Anybody else shoot theirs yet?
     
  7. CogburnR

    CogburnR Well-Known Member

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    I decided to develop a little 270/300WM data with some of the pile of 130g Barnes TTSX I have while fire forming brass also.

    I shot 4 with 72g of RL22 at an average of 3467fps with three going into a cloverleaf. Then I started a pressure series with IMR7828ssc from 70-74g and speeds from 3316 to 3481fps. Amazingly, the last four went into a one hole group of .312"@100y even though the powder charge was stepped up from 71-74g in 1g increments.

    I think there is room for more velocity but I will probably try some of the 135CE's at the next weather opening. It is nasty right now. My coal will be around 3.454" for a jump of .050". The Barnes were at a 3.469" coal for a .050" jump.
     
  8. Big Jake Duke

    Big Jake Duke Well-Known Member

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    Good info.

    I loaded 75 gr of retumbo as a starter. They shot well- 1/2-.625 at 3400 Fps. I only get to the range in the afternoon so it is always breezy and bad lighting. I dream of the .1 groups of the early morning shooters. No pressure signs at all, so I will load up the next batch in a ladder. I am seating the seal title band at the mouth of the case.
     
  9. Bullet bumper

    Bullet bumper Well-Known Member

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    .277 has been a victim of lack of popularity in target shooting mainly but also military . The bullet manufacturers put more work into the popular calibers . 224 , 6mm . 6.5 mm, 7mm, .308 .338 etc. Barrel manufactures are similar . .277 is a fringe dweller .
     
  10. Big Jake Duke

    Big Jake Duke Well-Known Member

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    You are correct- it may either be a fringe, or a victim of its own success. There are millions of win m70s, R.E.M. 700, Roger 77s savage 111s in a 1-10 twist.

    So a bullet manufacturer has to create something for where the market is. The newest set of bullets that have come out and faster twist barrels have given new life to this caliber.

    # 4 # it will out perform the 264s and 7mms at distance in energy and drop.

    140s with a Bc .590, 150s at .625. , 165s at .650 and the170 @ .704.

    So it has been the forgotten stepchild of long distance shooting, but it doesn't have to be.
     
  11. Bullet bumper

    Bullet bumper Well-Known Member

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    Manufacturers can make or break a caliber , with the right support and products the .277 can do as well as any other but it just never happened , a bit like 6mm Remington never won over the .243's avalanche of advertising hype . If you pay a respected gun writer to endorse a product then it's sales go up . Even if the product is inferior to it's competitors . He who pays first wins .
    A wider range of better bullets for .277 is a good thing for the caliber .
     
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  12. johnnyk

    johnnyk Well-Known Member

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    Jake,

    Any of these left? I'd like to try some in my .270 AM. JohnnyK.
     
  13. Big Jake Duke

    Big Jake Duke Well-Known Member

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    I have about 20 left

    Pm me your address-'but you will owe me a report on accuracy -velocity+projected drop

    They should be hammers in that rifle
     
  14. Big Jake Duke

    Big Jake Duke Well-Known Member

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    It is so true- those of us that have self migrated to these types of pages are always looking for something different. It is true you can kill a Deer dead with a .308, or an open sighted 30-30. You can also drive a yugo or walk to work.

    Attitudes that shut down ideas don't help anybody and they turn away a lot of new people looking for answers. somebody asks- hey has anyone thought of this? And the answer is " just buy a 7mm". That wasn't the question. And as an owner and past owner of various 7mm calibers, I'm not biased- that much.

    So we keep searching and standing on the shoulders of those who came here before. LTLR, KIRBY, BIGNGREEN, FEENIX, BUDLIGHT etc. one day marketing will catch up to us, but we will be on to something else by then.