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Barrel twist advice please.


turbo33
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From the research I can find, the Tikka t3 lite I am looking at as a foxing rifle is available in 1-12 twist or 1-8. My understanding is the lower rate is needed for heavier rounds, above 55grns........and predominantly target use? I Shall be using this for foxing, so I expect 40-55grn rounds. As I have the choice, do I need to go 1-8 for any reason or is 1-12 what I should go for?

 

Thanks

T33

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I would go for the 1 in 8. My Tikka T3 is a 1 in 8, and gives me sub 1" groups all day long at 100 yards with 45 grain bullets to 75 grain bullets. (Never tried anything over 75 grain)

I would prefer to have a choice, rather than a limitation of a 1 in 12.

You may be able to sell/trade a 1 in 8 more easily if you ever come to sell it as well?

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1 in 12 is fine for your needs. It should stabilise bullet weights up to 65 grains (depending on bullet profile) well enough. 1 in 8, as you say, is better for 65gr+ and good out to over 600yds for target. I shoot 55grs in mine which is 1:12 and it (after a bit of bedding work!) shoots sub moa.

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I had a 6 month wait for my 1:8 T3, not sure if there is still a waiting list but that may help you make a decision if you want/need it quickly.......

 

If you have to get a variation for a 223 then order a 1.8 now, apply for variation and the gun will still be in stock well before the paper work is sorted. :yes:

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1in12 is normal for a 223. The 1in8 was developed for the military for use with the long 69 grn ss109 bullet because they found that the 55grn tended to tumble and become less accurate at extreme range (500 yards) whereas the 69 wound gave more casualties which tied up the enemies resources better. I've got 1in12 and use 55grn through it OK.

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My understanding is the lower rate is needed for heavier rounds, above 55grns........and predominantly target use? I Shall be using this for foxing, so I expect 40-55grn rounds

 

Thanks

T33

The 1in8 is a faster twist and is used to stabilise long and heavy bullets EG 55 and larger. A 1in12 is more the normal standard.
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To be fair Underdog, you have a level of skill to be revered!! :good:

Not at all bud. Just a woods bum.

I actually struggled with roe stalking in Scotland.

Considering a few decades ago 222@50grn bullets were considered mustard on roe(and it was/is) with a 1/14" twist I fail to see how a hunter would need more than 1/12". Of course this is just my opinion, go for what you want.

I am concerned about expansion reliability with the 70grn+ bullets at the velocity a 223 can throw them! Maybe some one can give their experience in that regard?

 

U.

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Not at all bud. Just a woods bum.

I actually struggled with roe stalking in Scotland.

Considering a few decades ago 222@50grn bullets were considered mustard on roe(and it was/is) with a 1/14" twist I fail to see how a hunter would need more than 1/12". Of course this is just my opinion, go for what you want.

I am concerned about expansion reliability with the 70grn+ bullets at the velocity a 223 can throw them! Maybe some one can give their experience in that regard?

 

 

I very much respect your opinion Underdog, its all new territory to me and one I am grateful for advice on.

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weight has nothing to do with it

it is length...get short stubby flat base heavies instead of sexy VLD BTBT's

 

I shoot hornady 60gr flat base soft points in two 1:14" .222's with no problem whatsover

Flattens every roe I have used them on out to 200yds

 

the sako however has a real problem shooting 52 Amax, long, point, boat tail

 

pull the tips out of them and they shoot just fine

have had to move to SBK's in 40gr for a BT alternative

 

the BRNO 1:14 shot everything I threw at it from 40-60gr

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It also matters the speed of the bullet. I might have missed it somewhere else but I don't see where the OP specifies 223. The faster the bullet, the less barrel twist it needs. A 22-250 could get away with a 12 and a bit heavier bullets than a 222. In fact, the standard barrel for the 22-250 was a 14 twist with 50 or 55gr bullets. My own 223 is a 12 but I had no intentions of going over 40 grains when I got it.

 

thanks,

rick

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weight has nothing to do with it

it is length...get short stubby flat base heavies instead of sexy VLD BTBT's

 

I shoot hornady 60gr flat base soft points in two 1:14" .222's with no problem whatsover

Flattens every roe I have used them on out to 200yds

 

the sako however has a real problem shooting 52 Amax, long, point, boat tail

 

pull the tips out of them and they shoot just fine

have had to move to SBK's in 40gr for a BT alternative

 

the BRNO 1:14 shot everything I threw at it from 40-60gr

Totally agree with length of bullet being more important than weight regards twist rate. My comment was regarding 70 grain bullets I can't seem to get them fast enough in my 222 or old 223 to expand properly.

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It also matters the speed of the bullet. I might have missed it somewhere else but I don't see where the OP specifies 223. The faster the bullet, the less barrel twist it needs. A 22-250 could get away with a 12 and a bit heavier bullets than a 222. In fact, the standard barrel for the 22-250 was a 14 twist with 50 or 55gr bullets. My own 223 is a 12 but I had no intentions of going over 40 grains when I got it.

 

thanks,

rick

 

Thanks for the reply Rick. Yes sorry, the intended is a 223. Its for general varminting not target work. I am thinking 40-55grn.

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nope sorry if the length is too long for the twist you can shoot them at 4000fps if you want.....they won't stabilise, at least that is the direct results I have had trying and testing heavy for calibre loads

 

I have run 52gr over max loads at close to 3500fps in a 1:14 (which I suspect is more like a 1:14.5"-1:15")

made no odds at all, they are spiralling into the target creating an angled splash

pull the tips and I can run them right down to 3000fps

 

the 60gr in 1:14" run fast or slow would open up like a shotgun up to and above 6" but still impacting straight on

 

run them around the 3000-3100fps mark they shoot lovely liitle touching groups

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