This is a wildcat cartridge, for an explanation of Wildcatting read BE's excellent discussion of the Ackley Improved stuff here
Got a CZ-52? (I now want one for sure) Lusting after the FN 5.7x28 performance, but can't stand the $1000 price tag for the gun or FN's ammo prices? Well lust no more bubba, here's the answer.
.22 Reed Express - the FN puts a 27gr bullet out of a 5" barrel at 2200fps, the .22RE puts a 45gr bullet out of the same length at the same velocity
. 484ft/lbs at the muzzle, 60% more energy than the FN. What's needed is a new barrel, and a set of dies for reforming the standard 7.62x25 brass by necking it down to .224. And guess what? You can buy both from Reed's Ammunition and Research
. The page explaining the conversion is here
. The conversion is reversible and uses standard 7.62x25 magazines. The barrel is out of stock atm, but I'd guess it would cost about $225 based on his Thompson Contender barrels for the same round. The dies for the brass rework are $72. Use the standard recoil springs that came with the gun - a very good sign this isn't stressing the gun at all.
But looking at the price for an FN ($1000) and ammo ($.40 a round when you buy 1000) this looking like a hugely superior round on the cheap. And CZ anything doesn't scare me, Reed picked it because it's cheap, available and strong as hell.