Lee PrecisionWidenersInline FabricationTitan Reloading
ADvertise hereRotoMetals2MidSouth Shooters Supply

Results 1 to 16 of 16

Thread: Tikka 1:14 twist take off

  1. #1
    Boolit Mold
    Join Date
    May 2015
    Posts
    15

    Tikka 1:14 twist take off

    Good morning folks! I just got this barrel at a reasonable price and was wanting to use it in an AR build. It is a varmint profile at 24 inches and is chambered in 22/250. I want to re-chamber to 223 Wylde, shorten to 20 in., maybe as short as 16 in. In either case, can I assume a carbine length gas system would be best or what would be the longest gas system that could be used? My boolit is 61 grain, Elvis powder coated. 1800 fps min. would be my goal. Thanks for any input!

  2. #2
    Boolit Grand Master


    Larry Gibson's Avatar
    Join Date
    Jul 2005
    Location
    Lake Havasu City, Arizona
    Posts
    17,446
    That twist is too slow for what you want.
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  3. #3
    Boolit Grand Master

    Join Date
    Mar 2013
    Location
    Northwest Ohio
    Posts
    10,715
    The other issue will be getting the port hole timed into the groove not in a land or in between the 2. I to think 1-14 will be slow for 60 grn bullets length. A 1-12 or 1-10 might be better

  4. #4
    Boolit Mold
    Join Date
    May 2015
    Posts
    15
    So lighter bullet, then?

  5. #5
    Boolit Master
    Join Date
    Oct 2006
    Posts
    594
    1:14 is perfect. I'm pretty sure the boolit you refer to is blunt, so not very long. 1:14 stabilizes the Speer 70 grain jacketed bullet in .223; why wouldn't it stabilize a blunt 61 grain boolit? My 1:16" .22 Hornet stabilizes my 55 grain 225415.

    I would consider using a pistol length gas port location and an adjustable gas block. That would give you greater flexibility in powder choice and velocity.

  6. #6
    Boolit Grand Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    8,425
    Larry is probably right but original 223 was 1:12, made faster to get tumbling. Carbine gas should work fine. 16-18" would be good, stiffer barrel. GB is usually 0.75" ID. Prolly need GC on the mould.
    Whatever!

  7. #7
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
    Location
    over the hill, out in the woods and far away
    Posts
    7,222
    Original AR-15 twist as made by Stoner for the original 53-grain flatbase .224E2 bullet was 1:14" twist.

    This would not stabilize the 55-grain boattail M193, so the twist was changed to 1:12" when the Army first adopted the M16A1.

    A 1:14" twist when driven hard in the .22-250 with max. loads of 38 grains of IMR4350 will stabilize the 70-grain Speer RN, but it isn't going to do it at the velocities attainable in a .223, ain't gonna happen.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  8. #8
    Boolit Mold
    Join Date
    May 2015
    Posts
    15
    So if I push it faster? Still no good?
    Say 2200 fps?

  9. #9
    Boolit Grand Master


    Larry Gibson's Avatar
    Join Date
    Jul 2005
    Location
    Lake Havasu City, Arizona
    Posts
    17,446
    Quote Originally Posted by hitfar1 View Post
    So if I push it faster? Still no good?
    Say 2200 fps?
    Still ain't gonna happen...
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  10. #10
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
    Location
    over the hill, out in the woods and far away
    Posts
    7,222
    Quote Originally Posted by hitfar1 View Post
    So if I push it faster? Still no good?
    Say 2200 fps?
    3600 fps in a hot loaded .22-250 with 38 grains of IMR4350.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  11. #11
    Boolit Master
    swheeler's Avatar
    Join Date
    Mar 2005
    Location
    Montana
    Posts
    4,838
    That .675" long bullet will need right at 2900fps to stabilize in the 1:14 and a 1:11 or better twist to stabilize at your 1800 fps.
    Hell, I was there!

  12. #12
    Boolit Grand Master Texas by God's Avatar
    Join Date
    Mar 2016
    Location
    Texas
    Posts
    8,304
    You could sell the Tikka barrel for enough money to buy a nice ready made AR barrel just like you want.

  13. #13
    Boolit Mold
    Join Date
    May 2015
    Posts
    15
    Thanks for the info folks, pretty poor research on my part. Can I assume it could be done with a lighter boolit that is powder coated?

  14. #14
    Boolit Master
    swheeler's Avatar
    Join Date
    Mar 2005
    Location
    Montana
    Posts
    4,838
    Yes it could, doesn't even have to be powder coat. The bullet length is what you are concerned with, start looking at mold drawings from different sites and use this calculator to get you started, not the best but will work. http://kwk.us/twist.html RCBS shows their 55 gr FP stable in loads for 1:14 twist 22-250, Lyman Cast has data too, NOE TL 52 gr at .505" long will be stable at less than your 1800 fps, but with the blunt nose may not feed. Use the calculator to play around before you buy.
    Hell, I was there!

  15. #15
    Boolit Mold
    Join Date
    May 2015
    Posts
    15
    Thanks so much swheeler! Greatly appreciated.

  16. #16
    Boolit Master
    swheeler's Avatar
    Join Date
    Mar 2005
    Location
    Montana
    Posts
    4,838
    Hey anytime, the important thing is to have fun!
    Hell, I was there!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
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