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Thread: Subsonic 7x57 :-)

  1. #1
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    Subsonic 7x57 :-)

    Hi all
    Developed a sub sonic load for
    My 7x57 today using trail boss and 165gr sp
    Average Velocity 1005 fps :-)
    Puts a smile on my face every time I shoot it
    Ideal for my friends children when they fancy a shot
    At a paper target
    :-)

  2. #2
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    Eilean Leodhais
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    That sounds very interesting. Bet it’s great fun. Does it group well? I’ve had a hankering for a 7mm of some sort for quite a while now but can’t decide which one although the 7x64 is floating to the top

    Shot a lot of deer with the 7x57 in my younger days. One of the great cartridges that deserves to be more popular than it is but there’s always some bugger out there ready to reinvent the wheel(7mm-08 rem)

  3. #3
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    Groups

    Hi
    Sorry I don’t know what the groups are
    Like at 100 yards yet as I did this development to get them subsonic at 30 yards over a crony
    I am usually an accuracy nut, but this load is just for pure fun
    So am not really that bothered how accurate they are as these
    Will only be used on paper to create a BIG Smile on my face and the children
    Yes I did a lot of thinking when choosing a 7mm (used to have the swede)
    I am a big chap but find to much recoil does nothing for my accuracy!
    So went for the BSA Cf2 7x57 Stutzen as case capacity was similar to the swede all though I did fancy a straight.284 Winchester
    ATB

  4. #4
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    I know the pleasure of shooting subsonic full-bore. Try it with a modertor too!

  5. #5
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    Moderator

    Hi
    yes I was using a north star as I took it out off
    The Stutzen stock and bedded the action in a sporter
    Stock and free floated the barrel, it shoots a lot better now!!

  6. #6
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    Quote Originally Posted by sundog View Post
    That sounds very interesting. Bet it’s great fun. Does it group well? I’ve had a hankering for a 7mm of some sort for quite a while now but can’t decide which one although the 7x64 is floating to the top

    Shot a lot of deer with the 7x57 in my younger days. One of the great cartridges that deserves to be more popular than it is but there’s always some bugger out there ready to reinvent the wheel(7mm-08 rem)
    I see your point but I can get 7mm 08 brass easy as wink simply by passing 308 brass through a 7mm 08 full length sizer. 7x57 brass is not so easy to come by!

  7. #7
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    Brass

    Yes I agree
    Brass for the 7x57 isn’t readily available as other
    Brass but it’s for sale by various manufacturers
    I use Stella & belliot for my subs ( stain them black )
    So I know there the subs
    And more hard to come by , RWS for my hunting loads

  8. #8
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    You’ve inspired me to work up a subsonic/reduced load for my 308 so I bought some Trail boss at the robbing bar steward of a gun dealer in Inverness at the weekend. There’s some good info on the internet but do you have any hints or tips?

  9. #9
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    Gentlemen,

    Can we please call it by its proper name. .275 Rigby

    None of this johnny foreign nomenclature on the BBS.

  10. #10
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    on the estate I worked on we had both. The rifle the toffs would use was a Rigby and every year it would have to be taken to the gun smiths to have one thing or another done to it and even then I never trusted the thing to be on from one day to the next. The estate rifle was a Mauser with a lovely butter knife bolt that got dogs abuse and was never off. Guess which one we always took out for the hinds?

    We always called it the 7mm
    Last edited by sundog; 23-04-2018 at 03:02 PM.

  11. #11
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    Try it with a heavy, cast bullet. Quieter, more consistent and harder to mess up. It is not like you need 300 yard subsonics.

  12. #12
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    Subs

    Hi
    The only advice I can give is use a heavy for caliber bullet
    But with a short bearing surface to aid stability
    Seat bullet in case and mark we’re base of bullet is on the neck
    THATS YOUR MAXIMUM LOAD USING TRAIL BOSS
    I usually do my load testing over a crony to see when subsonic
    THEN AND ONLY THEN I put the mod on when I see holes in target not key holes (unstable)
    If they are unstable and your using a mod it will destroy it
    Good luck and have loads of FUN 😄
    Atb

  13. #13
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  14. #14
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    Thanks for that.

  15. #15
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    7mm

    funny I got some boxes of 275 rigby brass given and when opened they where full of
    Winchester 7mm Mauser head-stamped brass,
    as for sub load ,
    170gr GAS CHECKED LEAD BULLET, sized .285,
    14 GR UNIQUE,
    SPOT ON 100 YARDS,
    T,
    Last edited by TALL; 22-05-2018 at 07:24 PM.

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