Thread: .223 to .22-250

Hey guys, I have a Brno Zkk 601 deluxe in .223, and toying with the idea of getting it reamed out to a larger .22 cal cartridge. Is this costly, and would it have much of an impact on the rifle’s value?
Thinking 22-250, but also considering others e.g .223AI, .220swift, providing they’ll fit the internal mag.

Chamber reaming is not too expensive, but the bolt head would need opening out for a larger rim, the magazine follower and possibly the whole mag would need to be lengthened.
If all that works, Then there is the issue of the higher pressure in a barrel that is thinner at the breech due to rechambering, the reduced area of the locking lugs in relation to the case head and the higher pressures generated by all of those cartridges you mention
So all in all not a smart idea IMO.
Oops Forgot to mention that it would stuff its value.

the value goes out the window . . . . same as the money you put into the project

if your going to do it, do it for the better performance gains with your eyes wide open

i would suggest you buy a BRNO .243 if you want a dual purpose varmint/Deer rifle

Yep leave the 223 alone and just buy a 2nd rifle

Interesting scenario, I've had a .22-250 for years, issue with it was I wanted to put bigger pills than 5gr down but the 1:14 would allow that... so some thinking was done, result...

I have a new 1:8 twist 24" barrel being put together and reamed to .22-243... quite comfy for pushing the 74g pills have...

Confirm your twist rate and decide what size pills you want to use, if they won't work either rebarrel or just buy what you want to fit the purpose...

Thanks for the replies, will probably keep it .223, that definitely seems to be the general consensus. So far as I know it’s 1:12 twist.

Quote...In terms of terminal performance I've never seen much difference between the two cartridges (shooting coyotes to 600 yds with both cartridges). The .223 uses almost half the powder of a .22-250. ... The only advantage to the .22-250 is high velocity and flatter, easier long range shooting....end quote


Mate....After reading your post ,I thought quite interesting,as I have a 223,and no experience with a 22-250........I found this quote,amongst others,anyway ,hope it helps

Originally Posted by tanqueray

Hey guys, I have a Brno Zkk 601 deluxe in .223, and toying with the idea of getting it reamed out to a larger .22 cal cartridge. Is this costly, and would it have much of an impact on the rifle’s value?
Thinking 22-250, but also considering others e.g .223AI, .220swift, providing they’ll fit the internal mag.

What is your reasoning for wanting to go to the larger case? What do you want to do with it? Do you currently reload? I handload 55gr HPBT sierra gamekings and run them at just over 3200 fps from a short 18" barrel. It is very accurate at that and as long as its not too windy would be happy as to shoot rabbit sized critters out to 400 odd yards. A 22 or 24 inch barrel would have them going a bit quicker still.

Had the 223 out on the weekend harvesting some wild lambs, 4 nice clean headshots at between 120-170 odd yards. The 223 sure seems to be very versatile, cheap to run, suppressors down nice and quiet. And really doesnt give up much on a 22-250 for most uses.

First pic is 2 shots at 200 yards. 2nd is another 2 at 400 yards (6.5 moa dialed on)

If you want abit more grunt and less mucking around have you thought about reaming to 22-204?


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less mucking around???? .22-204 is in a roundabout way almost a .222 magnum lmfao...and having had a wee tootoo with one the gains over std .223 were hardly worth the hassle.
different loads in .223 will cover just about all the bases sure a .22-250 would be nice (always intreged me and sure do flatten wallabies) but the .223 does the job just nicely,and if by some chance you got 4hrs from home and realised you had left ammo at home on bench I know which cartridge I would rather be chambered in.

Well certinanly less mucking around than reaming it to 22-250, his twist won't suit pushing heavy pills so what's the point in 22-250, he obviously wants to change it to something so why not 22-204


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Originally Posted by Smiddy

If you want abit more grunt and less mucking around have you thought about reaming to 22-204?


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The hole in the barrelly bit would be too big for a .204 so he'd end up with a 222 magnum

Originally Posted by Smiddy

If you want abit more grunt and less mucking around have you thought about reaming to 22-204?


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The hole in the barrelly bit would be too big for a .204 so he'd end up with a 222 magnum.

Originally Posted by Marty Henry

The hole in the barrelly bit would be too big for a .204 so he'd end up with a 222 magnum.

No he would end up with a 22-204, there is a slight difference between the 22-204 and 222 magnum case


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I’d be looking at buying a 243 or 2506 if u want to up the ante