22 hornet

I believe the early BRNO's were .223...........short of slugging the bore.........Harold**I had a Sako that was tight as well
 
To slug a bore you need to drive a slightly oversize piece of lead into the barrel ,retrieve it and then measure it.
Or maybe you could fire a few factory loads into some jugs full of water and then measure the bullet diameter.
 
I just phoned cz usa and the parts guy said all cz hornets are still made .223 cal. So what happens if you shoot a .224 cal tip? I havent yet but a friend of mine shoots .224 out of his cz.
 
I can think of a couple of other examples where slightly oversized bullets are used safely:

1. Hornady .303 bullets are .312" instead of .311"
2. Ruger Mini 30s have a .308" bore, yet 7.62x39mm ammo generally uses a .310"-.311" bullet.
 
I don't think this is wise on the part of CZ, that small bullet dia. hasn't been used by others for many moons, and the selection of .224 bullets is much better, but like others have said "usem" anyways...
 
I talked to Dave Jennings and he told me the only thing that may happen is at max loads there might be more pressure with the .224. But with proper load development no problem
 
223 or 224

Ypu can shoot either with no accuracy change or pressure changes!! I have a few 465's and a more recent fox hornet. Fired them all with both sizes. Answer = no difference
 
I am surprised that CZ is using 223. As far as I know, everyone else has been making 224 Hornets since shortly after the cartridge was introduced. I have no experience with a 223 bore, but in my M70 Hornet, the 223 bullets give TERRIBLE accuracy, while 224 bullets will group into one hole every time I do my part.

Hugh
 
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