.222 RF 14"* Twist for pistol barrels
16" Standard twist for rifle barrels
17"* Special twist for rifle barrels
.224 CF 8" For bullets heavier than 70 gr.
9" For bullets up to 70 gr.
12" For bullets up to 63 gr.
14" For bullets up to 55 gr.
15"* For bullets up to 55 gr. driven 4,100 fps or more
16"* For bullets up to 55 gr. driven 4,300 fps or more
6mm/.243 8" Special for VLD bullets over 100 gr.
10" For bullets up to 120 gr. and VLD under 100 gr.
12" For bullets up to 85 gr.
13"* For bullets up to 75 gr.
14"* For bullets up to 70 gr.
15"* Special for bullets up to 70 gr.
I'd say that list isn't entirely accurate/complete, but then most things for twist rates are kind of situation dependent.
From shooting several .223's including 2 bolt guns and 3 AR's, I'd say that a 1-12 should definitely do a 55gr, and most likely a 60gr. A 1-9" will stabilize most bullets *under* 75gr, and depending on the bullet, may do 75-77gr (i.e. a lot of 1-9" twist barrels will stabilize a Hornady 75gr BTHP, but not a 75gr A-Max). A 1-8" twist should do an 80gr SMK, but a 1-7" twist will 'make sure' of any of the 75-80gr VLD's as well. For the 90gr JLK VLD, use a 1-6.5" twist.
milanuk,
I've got this info from Shilen web site,
and I agree with you, testing different weights will give me an anwser to what is the best for my cal.
I can't wait, tomorrow I gonna go and buy that Tikka Sporter, was the last piece and hope they didn't sell through the weekend.
I've called them on Saturday, but shop was closed so, I will see it tomorrow.
Peter pan--good news--the one tikka 308 sporter i shot shoots incredibly. regularly does 1" for 3 shots at 300yds with old 190hornady match and 168smk's.
also the stock s very comfortable [img]images/icons/wink.gif[/img]
There is a new version of this rifle to be released I think late spring to this summer in the T3 lineup. I have seen pictures of it and it looks really nice. As for the .5 MOA still in effect, I am not sure but I was told the regular T3's are said to be guarenteed Sub-Moa so I bet it will still be close to .5 MOA
__________________
Never pass up a kool-aid stand or lemonade stand. Remember it is a young American learning the American dream.
From now on, I only buy my Optics from Scott @ Liberty Optics. Best customer service I have ever seen period!
Sierra's introducing a 65 gr. BTSP Gameking, 10 twist recommended, with a B.C. of around .280-.290 soon. I've got some of them now, and they look good.
I've got an AR with a 9 twist Hart barrel that does fine with the 75 A-Max @ 2950 mv.
Linear Mode
