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Thread: 6.5 mm suitable twist?

  1. 10-15-2012, 09:45 PM #1
    fatelvis
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    6.5 mm suitable twist?

    I just bought a 15" 6.5 Bullberry barrel for my Contender. It has a 1:9 twist. Is that fast enough to stabilize a 140grn boolit? It should be moving about 1800 fps. Thanks!
    I shoot so that I can handload.
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  2. 10-15-2012, 09:58 PM #2
    geargnasher
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    Yup.

    Gear
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  3. 10-15-2012, 11:18 PM #3
    stubshaft
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    Ditto what Gear said.
    If you are going to make a hole in something. MAKE IT A BIG ONE!
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  4. 10-16-2012, 03:08 AM #4
    Dutchman
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    The 6.5x55 Carl Gustaf Model 63 target rifles have a 220mm twist = 1:8.66". The primary bullet weight for them is 139 gr.

    Dutch
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  5. 10-17-2012, 11:10 AM #5
    HORNET
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    FWIW, my old 6.5 x .257 is on a 6.5 Arisaka that is supposed to be a 9" twist. It stabilizes the Lyman 266469 at 140 grains just fine at around 1500 fps+. Seems to be real fond of IMR3031 with a touch of Dacron since the gas check is well below the case neck.
    Rick
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check