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Thread: lee 308-230 subsonic in the bo

  1. 11-12-2019, 07:57 AM #1
    Lloyd Smale
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    lee 308-230 subsonic in the bo

    This will be a ruger American not an ar I have to worry about function with. How slow can I go before I loose stability with this bullet.
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  2. 11-12-2019, 01:21 PM #2
    Lloyd Smale
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    well I found out that 3.5 grains of red dot is quiet. It at least puts holes in the snow.
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  3. 11-12-2019, 02:48 PM #3
    JimB..
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    You should have plenty of snow to shoot at today!

    Ever look at Don Miller’s work on your question? https://www.accurateshooter.com/tech...tes-stability/
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  4. 11-12-2019, 06:19 PM #4
    charlie b
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    I assume that it will have the 1:7 twist. If so the simplified stability calculators say it will be stable down to 500fps. Keep in mind that these calculators are designed for supersonic bullets so may not be that accurate at subsonic. Lee website says the bullet is 1.36" long.

    http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi
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  5. 11-13-2019, 07:48 AM #5
    Lloyd Smale
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    thanks Charlie!
    Quote Originally Posted by charlie b View Post
    I assume that it will have the 1:7 twist. If so the simplified stability calculators say it will be stable down to 500fps. Keep in mind that these calculators are designed for supersonic bullets so may not be that accurate at subsonic. Lee website says the bullet is 1.36" long.

    http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi
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  6. 11-13-2019, 09:11 PM #6
    charlie b
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    You're welcome. I just hope the formula works for you
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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