Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

22-250 twist rate

 
LinkBack Thread Tools Display Modes
  #15  
Old 05-20-2012, 05:33 PM
Zep Zep is offline
Silver Member
 
Join Date: Dec 2011
Posts: 382
Re: 22-250 twist rate

Can you relate your experience with the .223?

Many thanks to all.
Reply With Quote
  #16  
Old 05-20-2012, 08:13 PM
Junior Member
 
Join Date: Feb 2010
Location: Central Oregun
Posts: 12
Re: 22-250 twist rate

L= LENGTH OF BULLET IN INCHES
D- BULLET DIAMETER
T=RATE OF TWIST
sambo {QUOTE}

The orig. poster had a flawed formula in that it had no input for speed.

The 1-12 twist 22-250 will shoot the 69's if the elevation and speed are high.

But a slow speed .223 with a 1-12 won't shoot anything accurately 60 grains or higher, some 1-12's won't shoot the long 55 V-max.


in a 223 only. I own each twist and speak from experience, not formulas.
1-8 twist shoots 50-80's best is a 75 out to 600 yards.
1-9 twist shoots 34-75's best is a 69 out to 600 yards.
1-10 twist shoots 34-69's best is a 69 out to 600 yards.
1-12 twist shoots 30-55's best is a 55 out to 400 yards.
Reply With Quote
  #17  
Old 05-20-2012, 11:07 PM
Platinum Member
 
Join Date: Apr 2012
Location: The cold part of Montana
Posts: 1,390
Re: 22-250 twist rate

What I would like to know is how am I stabilizing a 53gr vmax in my 22-250 with a 1 in 14 twist. It shouldn't work but it does. according to a twist rate calculator I would have to push it north of 4100fps. All I got is my gunsmith is really damned good, and my dies are make some very concentric loads, so everything lines up just so.
Reply With Quote
  #18  
Old 05-21-2012, 08:10 AM
Zep Zep is offline
Silver Member
 
Join Date: Dec 2011
Posts: 382
Re: 22-250 twist rate

Gamehog - I was wondering what powder you are using for 223.
Reply With Quote
  #19  
Old 05-21-2012, 09:50 AM
Junior Member
 
Join Date: Feb 2010
Location: Central Oregun
Posts: 12
Re: 22-250 twist rate

Zep,

The best powder I have found to work with 34's thru 80's is IMR 8208. With my 9 twist .223 I have a 3 shot 100 yard one hole group, in the 68-69 grain groups same rifle 1/2" at 200 yards. Lapua brass, cci450's, the brass is turned and the bullets are sorted by weight. When I shoot varmints I use lake City brass (unturned) and CCI450's, with 53 V-max, and 55's and I don't sort the bullets by weight.


Best 200 yard loads:

53 V-max
CCI450
25.6 IMR-8208
Lapua brass
2.260 col

69 Nosler CC
CCI450
24.5 IMR-8208 * over max!
Lapua brass
2.260 col

Joe King has a good point, sometimes it just works.
Reply With Quote
  #20  
Old 05-21-2012, 10:52 AM
Platinum Member
 
Join Date: Jun 2010
Location: greenwood, IN
Posts: 3,580
Re: 22-250 twist rate

Quote:
Originally Posted by A_Gamehog View Post
Lots of misinformation here, by comparing the 223 and 22-250 with their twist rates. A 223 with a 10 twist shoots 69's a 22-250 with a 12 twist shoots 69's.

For the 12 twist 22-250 you can shoot the 34 Grain dogtowns all the way up to the 69's. I know I own and shoot one.

The most accurate is the long 60 grain V-max @ 3700+ fps.

The 69's from a 22-250 must be shot at 4,000 elevation to work, as the twist is bordering stability.

a 1:12 twist rate is good for roughly .30 B/C in the real world, and even then it's getting ragged. The Hornaday 53 Vmax is rated at .29 B/C, and really a 1:11 barrel would be better. I always work with a .85 factor number when figuring the thing out for a slight bit of cushion. The Sierra 1365 bullet is dead perfect for the 12 twist barrel, and my groups from three barrels seem to show this (mid twos for five shots if I'm lucky). I don't know what the B/C is for the Noslers, but it's gotta be in the .35 or higher range, and with that you need the 1:9 barrel minimum (maybe close to a .40B/C).

a .223 bore barrel in any caliber is still a .223 bore with a certain rate of twist. The twist rate is what stablizes a bullet, and never the velocity or really even the rpm's at impact like we all thought thirty years back. A 1:14 twist 22-250 will not stabalize a bullet any better than a typical .223 in a barrel with the same rate os twist. Just the nature of the beast. It cost me a lot of hard earned money to learn this the hard way
gary
Reply With Quote
  #21  
Old 05-21-2012, 11:00 AM
Zep Zep is offline
Silver Member
 
Join Date: Dec 2011
Posts: 382
Re: 22-250 twist rate

Gamedog - Many thanks. I was doing a lot of reading last night and I was wondering about Varget for .223 for a lite bullet, 34 grain Dogtown or a 40 or 50 grain Sierra. Gun is a 1-12 twist. Have you tried Varget here.

I shoot all year and I like the idea of the no real temperature sensitivity with the Varget but as I am sure you are aware some of the upper loads can go compressed. I am not sure about compressed loads, I am not smart enough to start with that just yet.

Also thinking of H322 as it appears to be less temperature sensitive than some other powders.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 22-250 twist rate
Thread Thread Starter Forum Replies Last Post
Best rate of twist for 243. win matt_3479 Long Range Hunting & Shooting 8 07-27-2013 09:48 PM
Twist rate ? 6mm Rifles, Bullets, Barrels and Ballistics 6 09-25-2009 12:01 PM
Rate of Twist nate-lab Rifles, Bullets, Barrels and Ballistics 2 02-21-2009 08:54 PM
243 Twist Rate kdog70 Long Range Hunting & Shooting 11 02-18-2009 11:00 PM
Twist rate of a CZ 527 OKbow87 Rifles, Bullets, Barrels and Ballistics 2 11-16-2006 12:02 PM

Current Poll
Do you archery hunt for elk?
YES - 32.46%
74 Votes
NO - 50.88%
116 Votes
Not yet, but I plan to. - 16.67%
38 Votes
Total Votes: 228
You may not vote on this poll.

All times are GMT -5. The time now is 09:11 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC