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22/250 with fast twist barrel.

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/20/2010 at 09:42
jay 22/250 View Drop Down
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hi guys how many of you out there have a 22/250 with a fast twist barrel to push heaiver bullets ?
 
i no most 22/250 rifles are a 1 in 14 twist but some are 1 in 12.
 
but have any of you got a 1 in 9 or 1 in 8 twist. ? someone i speak to on a different forum has got a 1 in 9 pushing 75 grain vmax at 3300 ish fps so it offers good bc for a 22 cal rifle.
 
and he said its dead accurate and great for long range varmints. now this has got me intrested tohave mine changed in the future.
 
would the 1 in 9 still be able to push the 50 to 55 grain bullets accurately still ?
 
i
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/20/2010 at 21:26
pyro6999 View Drop Down
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overspin could be an issue at those speeds with that light of a weight of projectile. of course this is pure speculation on my part.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/26/2010 at 07:23
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Originally posted by jay 22/250 jay 22/250 wrote:

hi guys how many of you out there have a 22/250 with a fast twist barrel to push heaiver bullets ?
 
i no most 22/250 rifles are a 1 in 14 twist but some are 1 in 12.
 
but have any of you got a 1 in 9 or 1 in 8 twist. ? someone i speak to on a different forum has got a 1 in 9 pushing 75 grain vmax at 3300 ish fps so it offers good bc for a 22 cal rifle.
 
and he said its dead accurate and great for long range varmints. now this has got me intrested tohave mine changed in the future.
 
would the 1 in 9 still be able to push the 50 to 55 grain bullets accurately still ?
 
i
 
yes, but lighter then a 50 is iffy.
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/26/2010 at 08:08
Dale Clifford View Drop Down
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Problem with using 75gr or heavier in swifts and 250's is why not just use a 6mm in 87. The powder capacity is about the same and barrel life would be somewhat longer. Velocity is about the same for the 87 as you are using for the 75 in 22. Faster twist rates with lighter bullets really don't cause problems, if they aren't accurate its just like any other combination, its just not accurate. The bullet still takes 7 inches of travel for one rev. as opposed to say 12 inches, and completes the same number of rev. in a relative shorter distance. Its that trying to get the same velocity from a 1 in 7 inch vs. a 1 in 12 inch will be more difficult. The fast twist 22's I have and use seem not to like secant ogives.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/26/2010 at 08:51
jay 22/250 View Drop Down
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Originally posted by Dale Clifford Dale Clifford wrote:

Problem with using 75gr or heavier in swifts and 250's is why not just use a 6mm in 87. The powder capacity is about the same and barrel life would be somewhat longer. Velocity is about the same for the 87 as you are using for the 75 in 22. Faster twist rates with lighter bullets really don't cause problems, if they aren't accurate its just like any other combination, its just not accurate. The bullet still takes 7 inches of travel for one rev. as opposed to say 12 inches, and completes the same number of rev. in a relative shorter distance. Its that trying to get the same velocity from a 1 in 7 inch vs. a 1 in 12 inch will be more difficult. The fast twist 22's I have and use seem not to like secant ogives.

 
a lad i no cant get over 3300 from his 6 br pushing the 75 grain bullet. and he has a 24 inch barrel. to get that speed he would have to go longer.
 
my mates 22/250 with 1 in9 is doing over this speed with a 24 inch barrel. as for grouping its sopt on and with the amax overs a superb bc
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/26/2010 at 10:11
Dale Clifford View Drop Down
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bc difference is only .035  which wouldn't be noticable in most shooting and a reg. 6mm will easily get 3300 fps with Hybrid.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/26/2010 at 11:13
Mike McDonald View Drop Down
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I ran a pair of 22-250's with 1:8 and 1:9 barrels.
The amax is a decent bullet bt the 80 grain Sieera at 3000 fps will out shoot it close and far, and is much better in the wind.
Barrel life is going to be between 400 and 1000 rounds with this set up.  It's very hard on barrels with that much powder going through a small 22 cal hole.
The 6-250 is a better choice for bullet selectionas well as barrel life.  You can push 107's to 2800 fps and have stellar accuracy at distance.
 
You can look at the 1:7 223 remington with 80 grain ssierras.  66% of the powder charge and still 2900 fps easy.  Accuracy is phenominal and it's fully 1000 yard capable at 31.5 moa
and barrel life is increased to about 2500 rounds.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/27/2010 at 04:23
jay 22/250 View Drop Down
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i think i would just go the 6br route then lads.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/27/2010 at 04:29
jay 22/250 View Drop Down
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ive got a tikka m595 222 the action and stock is mint. the barrel looks like it is on its last legs. im thinking of a rebarrel in 20 tac
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/28/2010 at 14:26
Stevey View Drop Down
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SmileI have a 1-9 twist .22-250.
 
It will shoot 40g Hornady V Max's, all 50 grain to 60 grain, and 68 grain Hornady bthp's extremely well. The 40 grain Hornady V Max bullets get about 4000 fps and shoot well under 1 moa (RS TAC, Varget, Re 10x). The 68 grain H bthp get about 3200 fps and sometimes land in the same hole (H4350 & RS Hunter)
 
I tried the 75 grain Hornady AMax bullets but they would only shoot poor to really bad groups depending on temp. and elevation (like up in the mountains).
 
I shoot the 68 grain H bthp almost all the time and have found it adequate up to 500 yds -- if I want more I have a 1-8 twist .243 Win that shoots the 105 grain Hornady Amax really well.
 
Yes, barrel life is not so good but I have another 1-10 twist .22-250 (15 years old) that gets slightly over 1 moa with the 40 grain VMax and TAC & Re 10X with almost 5,000 rounds through it -- good enough for any varmint on the planet. The throat looks real rough but it keeps on shooting.
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