Convert 5.56 NATO to 222 Remington?

[englishman_ca]

A quick question.

I have put together a Sht.22 Mk.IV* Frankenfield rechambered in 222 Remington.



Got it cycling. It shoots like a charm. I have enjoyed plinking away, setting up the scope.

Burned through the ammo that I have on hand (had the ammo years before I had the rifle!!??).

Getting the kit together to reload for this little varmint cartridge.

I need more brass. I just had a brain wave, or it might be a brain fart?

I have a pile of ex military 5.56 NATO brass.............


I looked in my reloader's manual. The two cases look to be similar. This seems too easy. What am I missing?

So I ask a general question. Reforming the 223 to 222 by moving the shoulder back and resizing?

Is it doable? Does anybody have experience? Or will I find it to be a pain in the arse and am better off just buying the proper 222 brass?

 

[tiriaq]

Size, trim, chamfer. Should be good to go.

 

[K-C]

Size, trim, chamfer. Should be good to go.

^^^^ This ^^^^

 

[Ganderite]

I would run a 223 reamer into the 222 chamber.