On the 25-222(25 copperhead) you might have to open the top of the die slightly to allow the larger neck through the opening. I had to do this with my 25-204. Also if you want to use the expander ball in the 20-222 you will need to get a smaller stem as the 20 cal. ball won't fit on a 224 stem. I had to get a larger stem for my 204 Ruger Redding Type S FL Bushing die to load 22-204, 6mm-204 and 25-204 set. Luckily I was able to use the 204 stem in my 223 Rem bushing die to load 20 Practical, I also load 223 Rem and 6x45mm on that same die. I don't turn necks so I use an expander ball.
I love the 222 Rem case it is one of my goto's for coyote hunting. A 20-222 Rem makes a lot of sense but if your necking up, it seems like your looking for more UMPH so I'd personally go with the 223/223AI or 22 Nosler case if you want to keep the .378 bolt face or use the 204 or even 5.6x50mm case(quite popular in Australia in 6x50mmm for roo shooting) if you are not using a mini action. The 5.6x50mm case comes in a rimmed version if your working with a single shot action. The 257 Kimber(25-222 Rem Mag Improved)25-223 AI/25-204/25-5.6x50mm will all duplicate original factory ballistics of the 250-3000 and 257 Roberts well proven deer medicine..
Last edited by erich; 07/14/19.
