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Old February 14, 2008, 10:29 PM   #1
kgpcr
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22-250 1:12 twist will 60grn bullets work??

I pick up my rifle on Saturday and I am going to start loading some ammo. I have a huge stash of Sierra 60grn hollow points and 60grn Nosler Ballistic Tip bullets. I have been told they will not shoot well with a 1:12 twist. Any one out there load 60grn bullets with a 1:12 twist with good results? any loads that work well? Thanks for the help!!!
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Old February 14, 2008, 11:00 PM   #2
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.224 CF
- 7" for bullets heavier than 80gr.
- 8" for bullets up to 80gr.
- 8"* Ratchet rifled 4 groove
- 9" for bullets up to 70gr.
- 12: for bullets up to 63gr.
- 14" for bullets up to 55gr.
- 14"* Ratchet rifled 4 groove
- 15"* for bullets up to 55gr. driven 4,100 pfs or more
- 16:* for bullets up to 55gr. driven 4,300 fps or more
http://www.shilen.com/calibersAndTwists.html
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Old February 15, 2008, 01:44 AM   #3
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It should work OK. I have fired 60 gr bullets out of my 1:14" twist barrel.
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Old February 15, 2008, 02:13 AM   #4
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Depends on the length of the bullet as it is the bullet length, not the weight, that determines the twist needed.

That being said. With a 22-250 it should work fine. 60 grain bullets work fine in my Savage that I bought specifically because it had both a 1-12" twist and a 26" barrel. Load a few and see how they group.
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Old February 16, 2008, 09:47 PM   #5
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What kind of rifle do you have that has a 1:12? Is it custom or off the shelf? My ideal 22-250 would have a 1:10 for 65 gr'ers
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Old February 16, 2008, 09:55 PM   #6
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1:12 is pretty common for "sporting" .22 centerfire calibers. I have a TC Encore in .223 with a 1:12 twist barrel on it.

Should be good up to past 60 grains for copper-jacketed lead bullets.
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Old February 16, 2008, 09:59 PM   #7
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Yes, common in .223, but not 22-250. 1:14 is the industry standard for the 22-250.
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Old February 17, 2008, 02:26 AM   #8
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Savage makes one of their bolt action varmint rifles in 22-250 with a 1-9" Twist. (And a 1-7" 223.) Imagine how fast you could throw those 90 grain MatchKings with that!!!
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Old February 17, 2008, 07:44 AM   #9
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Its a Savage 12FLV
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Old February 17, 2008, 12:28 PM   #10
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Funny, mine is a Savage Model 12 and it has a 1:12 twist...

I've used Sierra MatchKings in the low 60gr range out to 200 yards. So far, they've seem to work fine. I think you'd need to shoot at least 300-400 to see noticeable differences, IMO. The reasoning to me is 200yds. for a .22-250 is a cake-walk. The velocity and trajectory is still very fast and flat. At 300yds on out is where I'd think you'd see the performance differences to take place. I think this would apply to the low 60's grain because this appears to be about the cutoff point of seeing stable flight.

Now if you use 77gr. for example, I think you'd see unstable flight almost right off the bat...probably even at 100yds or so. Bullet tumbling would be inevitable at 200yds.

For my Savage, the 52gr SMK HPBT has been the cat's meow. I'm in love with this selection. Hornady's 55gr FMJ BT has given me less than desirable results. Only 3 grains difference and a different manufacture gave me quite the difference in results. I've found that my rifle is pretty picky. Yours might or might not be the same.

Hope this muddies up the water for ya....
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Old February 17, 2008, 01:44 PM   #11
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My 14 twist .22-250 shoots the Hornady 60 gr SP quite well, but the slightly longer 60 gr HP is just wild. So I figure a 12 twist will do fine with either. It will not handle much heavier bullets, though.

But, like Tuttle, mine is best with the 52 gr SMK. I am not surprised he does not get as good results with FMJs.
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Old February 17, 2008, 02:19 PM   #12
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Quote:
But, like Tuttle, mine is best with the 52 gr SMK. I am not surprised he does not get as good results with FMJs.
Can you give me your thoughts, Jim? My guess was that the ogive and overall shape of the bullet is different from the SMK's. The distance to the lands appear to be different with the Hornady bullets and wondering if this is on the same school of thought with yours....
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Old February 18, 2008, 10:56 AM   #13
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I've had excellent results w/ Sierra 55 gr. game kings in my 1:14. I'm going to look for that Savage rifle. That IS the combo I'm looking for. That should be able to go up to 70 gr. w/ no problem, and produce sub 1/2" moa w/ 55's.
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Old February 18, 2008, 02:50 PM   #14
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Where the SMK bullets really shine is in the transonic range. that is what they were designed for.
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Old February 18, 2008, 10:01 PM   #15
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Quote:
Where the SMK bullets really shine is in the transonic range. that is what they were designed for.
Is this, in comparison, where the Hornady bullets I've tried fall short?
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Old February 18, 2008, 11:24 PM   #16
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If your shooting at ranges that will make the bullet go transonic the answer is yes. I hate to push a brand but I have had better luck with sierra bullets than hornaday in all my rifles.


Quote:
Is this, in comparison, where the Hornady bullets I've tried fall short?
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Old February 19, 2008, 12:58 AM   #17
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Quote:
Where the SMK bullets really shine is in the transonic range. that is what they were designed for.
Don't know about that, but since it won't go transsonic until about 900 yds, is it really a concern? FWIW, Hornady bullets shoot fine out of my 22-250.
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Old February 19, 2008, 08:41 AM   #18
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Tuttle, I think the reason you do not see as good accuracy with FMJs is at the other end of the bullet. FMJs generally have open bases and they are not as uniform as can be made for a HP or SP where the jacket is smooth, flat, and even across the bottom. And the base is what governs bullet exit from the barrel, one writer called it the steering end.

Quote:
Where the SMK bullets really shine is in the transonic range. that is what they were designed for.
No, the SMK bullets were designed to delay the transition as long as possible. There are ranges that will not even allow the use of .308 168 SMK at 1000 yards because the load goes subsonic and wild before it reaches the targets.
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Old February 19, 2008, 09:29 PM   #19
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Well, I guess that would make sense since the last point of drag on a typical object is the back. And whatever shape or geometry setup you have there could affect the charactoristics of flight...

Quote:
Don't know about that, but since it won't go transsonic until about 900 yds, is it really a concern? FWIW, Hornady bullets shoot fine out of my 22-250.
Just for clarification, Scorch...

Hornady's bullets shoot fine out of my rifle. However, I get really picky when I'm shooting for accuracy. So, a 1/2 inch or so difference at 100 or 200 yards is quite a bit for my taste. I wanted to make sure you and others know that I think they make fine bullets. But for just a little more money I want to strive for the "X" only on my shots....
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