What calibre to change to if any, or not

prodj1000@hotmail.com · Sun Sep 23, 2007 12:46 am

i currently have a rugar m77 mkII 22-250 synthetic stainless. had it about 2years and have burnt out the barrel. planning on getting a new tobler 26inch barrel for it, and thinking of changing cal to maybe a 243 or somthing that can carry a larger pill.
Or should i just keep it as a 250
Wanting good accuracy out around 300-500yrds with out going to heavy, it use to have good accuracy but now struggle to stay on A4 at 300

I dont have a lot of room to play with in the magazine and factory rounds just fit in

Open to eveyones oppinion and experiences
cheers

woob614271 · Post by **woob614271** » Sun Sep 23, 2007 6:31 am

Keep it as a 22.250 (maybe go AI?) but have a 1:10 twist in the new one...

Con · Post by **Con** » Sun Sep 23, 2007 6:51 am

woob614271 wrote:Keep it as a 22.250 (maybe go AI?) but have a 1:10 twist in the new one...

Amen brother!!! Hot 22cal (22/250AI, SwiftAI, Clark, Middlestead), long fast twist barrel, 69gr Sierra MK. That would be my choice if I had the need for a long-range varminter.
Cheers...
Con

woob614271 · Post by **woob614271** » Sun Sep 23, 2007 9:23 am

More on why I reckon on staying with a high performance 224 cal:
1. It can still run the lighter projies (50 to 60 grainers)
2. It can run the RWS 74 grain KSs for larger game (the Europeans use 'em for deer and boar)
3. The availability of brass,other projies, suitably powders, load data, dies and all the other stuff
4. It's a proven long range and accurate killer on most small and medium game.

243redmist · Post by **243redmist** » Mon Sep 24, 2007 9:01 am

woob614271 wrote:More on why I reckon on staying with a high performance 224 cal:
1. It can still run the lighter projies (50 to 60 grainers)
2. It can run the RWS 74 grain KSs for larger game (the Europeans use 'em for deer and boar)
3. The availability of brass,other projies, suitably powders, load data, dies and all the other stuff
4. It's a proven long range and accurate killer on most small and medium game.

More on why I reckon you should change to a high performance 243 cal:
1. It can still run the lighter projies (55 to 60 grainers)
2. It can run the hornady 87 grain vmax for long distant game
3. The availability of brass,other projies, suitably powders, load data, dies and all the other stuff
4. It's a proven long range and accurate killer on most small and medium game.

Drew Jaeger · Post by **Drew Jaeger** » Mon Sep 24, 2007 2:58 pm

243redmist wrote:More on why I reckon you should change to a high performance 243 cal:
1. It can still run the lighter projies (55 to 60 grainers)
2. It can run the hornady 87 grain vmax for long distant game
3. The availability of brass,other projies, suitably powders, load data, dies and all the other stuff
4. It's a proven long range and accurate killer on most small and medium game.

^ what he said.

HiWall · Post by **HiWall** » Mon Sep 24, 2007 3:23 pm

I dont have a lot of room to play with in the magazine and factory rounds just fit in

The answer is in your own question mate. SAAMI max coal for the .22/250 is 2.350" and for the .243 is 2.710". You won't have enough room in the magazine box unless there is a removable block in the mag or you want a single shot rifle.

If you reload I reckon the .22/250Ackley is the go. Barrel twist for whatever you want to shoot through it. One of my AI's runs 1:8 the other 1:14.

7mmmag · Post by **7mmmag** » Tue Sep 25, 2007 8:09 am

22-250, like hiwall said, better to be able to seat the projectiles out for better accuracy than having to seat the 243 projectiles too deep.

That said, nothing wrong with the 243

Kenny · Post by **Kenny** » Tue Sep 25, 2007 10:38 am

I would go the 243

As been said before...lighter pills to blow varmints apart and heavier pills for the bigger game.

I have owned both calibers but currently shoot a 243....the 250 was nice but the 6mm just seems to do it easier.

I am yet to see a 22 cal do anything more spectacular than a 6mm can...in my experience anyway

KY

prodj1000@hotmail.com · Tue Sep 25, 2007 1:53 pm

Cheers for everbodys input,
when you guys say ackley improved, what does he actually do or change in the rifle?

ogre6br · Post by **ogre6br** » Tue Sep 25, 2007 1:56 pm

why not get a 6/250 AI and you have all the good bits of the AI case and all the good bits of the 6mm bore diameter
and you shouldn't have any magazine length issues?

even if you go for a standard 22/250 again get tobler to take out the mag block if there is one so you can use all you case capacity by seating your projectiles long

later
p

woob614271 · Post by **woob614271** » Tue Sep 25, 2007 3:55 pm

AI, or ackley Improved is a means f (supposedly) getting better performance out of a cartridge by making it (and the chamber, of course) more parallel sided; ie. less taper in the body of the case; and witha steeper/sharper angle on the shoulder. It supposedly gives longer case life, easier extraction, and greater velocity with a slight increase in the amount of powder used.
People have been arguing the pros and cons ever since P O Ackley came up with the idea, along with others, way back in the 1930s-40s.

bushchook · Post by **bushchook** » Tue Sep 25, 2007 8:47 pm

Will be a simple matter to convert the .22/250 magazine to .243 if changes are necessary . Frankly I doubt that any will be required as the 2 cartridges are quite similar in length and unlikely that the .22/250 would need a magazine block to feed in .243/.308 length magazines.
Never owned a Ruger but know that action will handle .220 Swift without problems. Swift case is longer than .243 .
.243 does everything the .22/250 does and more . Have had both and 2 Swifts. .22/250 would be my last choice out of the 3 .

Ned Kelly · Post by **Ned Kelly** » Thu Sep 27, 2007 7:42 am

G'day all,
you could consider the 6XC which is a blown out 22-250 that looks like a shortened 243. Case it just over 2" long. Used by D Tubb to win some long range stuff in the US..........

Cheerio Ned

Sam Walker · Post by **Sam Walker** » Thu Sep 27, 2007 2:40 pm

how about the Lapua 6x47 ?

AusVarmint

What calibre to change to if any, or not

Should i change the cal or keep it as 250

What calibre to change to if any, or not