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Thread: 22-250 problems stabilising 55grain

  1. #1

    22-250 problems stabilising 55grain

    Anybody else have problems with a 1:14 twist 22-250 stabilising 55 grain pills. Im pushing 55 grain nosler bt's out at 3500fps over N140 and getting a shotgun pattern. The rifle shoots PPU 55 grain soft points quite well so i thought the same weight in a ballistic tip would be fine.

    I did a bit of research and apparently it is not 100% down to the weight of the bullet but also the length. The noslers are actually quite a long .22 cal bullet at .0810 so was thinking to maybe try the sierra 55 grain semi points which are .0690 long. I dont really want to drop back to 50 grains and wondered if anybody had had issues stabilising these bullets in a 1:14 twist barrel.

    Would i be correct in saying that shooting a 55 grain bullet from a 1:14 twist is right on its limit? What are your thoughts on the ideal twist for a 22-250??

    All help appreciated as always
    Sam

  2. #2
    I used 55 gn Hornady SX in the 223. No trouble at all. Velocity is 3300fps 1:14 twist.

  3. #3
    I used 55 gn Hornady SX in the 223. No trouble at all. Velocity is 3300fps 1:14 twist.

  4. #4

  5. #5
    Quote Originally Posted by jcampbellsmith View Post
    Sam. Have you looked at Twist Rate Stability Calculator | Berger Bullets or similar? Regards JCS
    Just checked this now and it is saying unstable. Brilliant little calculator that is JCS, thanks. Recommending a 1:9.5 twist

  6. #6
    Ive just put all my loads through this and only one is coming up as mildly stable even though i am shooting great groups with my other rifles.

  7. #7
    I reload for 7 different 22.250 including my own R93. All are 14 twists and all shoot the 55 gr V Max sub .5".

    I am not a fan of N140 with the 55 gr but use exclusively N150 - all 7 rifles have their bullets seated well well back from the lands. Mine is seated 222 thou back and a short barrelled Tikka is 148 thou back

  8. #8
    Quote Originally Posted by PeterH View Post
    I reload for 7 different 22.250 including my own R93. All are 14 twists and all shoot the 55 gr V Max sub .5".

    I am not a fan of N140 with the 55 gr but use exclusively N150 - all 7 rifles have their bullets seated well well back from the lands. Mine is seated 222 thou back and a short barrelled Tikka is 148 thou back
    Peter
    Yes i dont think the n140 is the right gear for the job, i only started with it because i use it in my .308 I have n150 lying around and will try that, I have also been told to try ramshot big game which i have a tub of so will give that a go. Have you used the twist rate calculator that JCS suggested? If not could you put a couple of your loads through it to see what it says, would be interesting to see if the rounds shooting .5" are stabilising as to what their calculator says.

  9. #9
    Quote Originally Posted by s8mdevo View Post
    Peter
    Yes i dont think the n140 is the right gear for the job, i only started with it because i use it in my .308 I have n150 lying around and will try that, I have also been told to try ramshot big game which i have a tub of so will give that a go. Have you used the twist rate calculator that JCS suggested? If not could you put a couple of your loads through it to see what it says, would be interesting to see if the rounds shooting .5" are stabilising as to what their calculator says.
    Not used the calculator but will have a look at it. I have regularly taken my 22.250 out to 400 yds and it will always (wind permitting) group within 2.5 to 3.5 ins which for me is fine for what I use it for.

  10. #10
    Click image for larger version. 

Name:	22,250  207 yds.jpg 
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ID:	52670Just put the info into this calculator and the result is 'unstable' Hm.... if that is the case then why do 22,250 manufacturers default to a 14 twist. I except that the 55 gr is at the limit of a 14 twist but as I have never had any issues with this weight of bullet as stated being poor accuracy and key holing. This was my 22.250 after a friend said my rifle was off when he missed a fox at 207 the previous night ! Therefore I am inclined to disregard this calculation.

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