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Thread: 260 REM twist rate

  1. #1

    260 REM twist rate

    Anyone shooting 95 gr v-max with a1 in 8 twist wondering if the stability is ok looking to shoot 95 gr to 140 gr with a 1 in 8 twist has anyone had any experience with this in 260 Rem.
    Cheers Matt

  2. #2
    Quote Originally Posted by Matt234 View Post
    Anyone shooting 95 gr v-max with a1 in 8 twist wondering if the stability is ok looking to shoot 95 gr to 140 gr with a 1 in 8 twist has anyone had any experience with this in 260 Rem.
    Cheers Matt
    The 6.5 Swede has a twist just under 8" (7.5"??) and it shoots 95-160 grain bullets just fine. My Swede has this twist and shoots 100 through 160 grain bullets very well, indeed.~Muir

  3. #3
    SD Regular Greener Jim's Avatar
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    Pop the bullet lengths from this www.ShootForum.com - Bullet Database into this Twist Rate Stability Calculator | Berger Bullets

    Should give you an idea. Use the velocity predicted in whichever load data you are using.
    At 3200 fps the calculator reckons it'll be stabilised just fine.

    Also, with the long (1.41") Hornady 140gr SST at a low 2500fps the calculator reckons it'll stabilise but not that well. Use any of the shorter 140gr hunting bullets (approx 1.3") at the same velocity and stability is much better.
    Any Questions Feel Free to PM me

  4. #4
    Concur completely with Muir, my .260 has a 1:8" 26" barrel and handles all projectiles from the 85 Grain Sierra HP to the 140 grain SST'S , all shoot within the 1" with the 85 Sierras providing the tightest groups. The 130gr Nosler BT'S have been troublesome but I suspect that my barrel does not like 130 BT'S with N560 powder. I have tested ;
    1) 85gr Sierra ( VG )
    2) 95gr VMAX ( VG )
    3) 100gr Hornady SP ( VG )
    4) 120gr Speer SP ( rubbish )
    5) 123gr SST/129gr SST/ 140gr SST. ( all VG )
    6) 130gr Nosler BT ( needs more work )
    7) 140gr Barnes Match ( nothing to write home about )

    regards
    Mike.
    Last edited by Coolhand; 17-06-2015 at 05:30.

  5. #5
    Quote Originally Posted by Matt234 View Post
    Anyone shooting 95 gr v-max with a1 in 8 twist wondering if the stability is ok looking to shoot 95 gr to 140 gr with a 1 in 8 twist has anyone had any experience with this in 260 Rem.
    Cheers Matt
    Matt. My first custom 260 Rem had a 1:8 twist barrel. Both current rifles have 1:8.5 twist and I've shot up to 142 gr SMKs with no issues. Some folk select 1:8.3 twist barrels, but any of these twists will work. More importantly you should be considering what COL your action is going to allow you to work with.

    One of my 260 Rems has a magazine and is limited to 2.8 inches COL. The other has a Wyatts Box and can have rounds up to 3.1 inches in length.

    Pick the bullet you plan to use and make up a dummy round and see whether or not it will work in your action. Discuss with your rifle smith how you want the chamber throated and what bullets you plan to use. My recommendation would be to use as few bullet types as possible, probably two, ideally one in the 120 gr to 130 gr weight range.

    Regards

    JCS

  6. #6
    Thanks everyone for the help with this thinking that 1 in 8 is the way to go I had run this by the ballistics calculator just decided to ask on the forum just to make sure I did think that there must be someone with practical experience on here thanks for all your input.
    Cheers Matt

  7. #7
    1-8" is pretty much the standard twist for .264" bullets.
    I think factory 260 Rems may have come with a 1-9" though.

  8. #8
    Quote Originally Posted by Matt234 View Post
    Anyone shooting 95 gr v-max with a1 in 8 twist wondering if the stability is ok looking to shoot 95 gr to 140 gr with a 1 in 8 twist has anyone had any experience with this in 260 Rem.
    Cheers Matt
    I'm using 95's in a bartlien 5r 1-8" powered by CFE223, good enough to do a 1.3" group at 500 yards, so I'd say they work fine, even had them out to 900 and worked well.
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