Ackman said:
Congrats on the 222M. You'll be stuck using Rem. brass.
Well, normally, Rem brass is fairly low on my list (but above Federal), but I owned two 204s and gave up on the calibre because ALL the 204 brass sucks - I went to a 20 Tac because of Lapua brass.
But I have a 222 Mag BR rifle that sat in the back of the safe for a very looooong time and I dug it out last year, put a new Leupold BR scope on it, and decided to get all of my brass to one starting place.
So I pulled what was loaded, washed, cleaned, annealed, and polished all 850+ cases... then I sorted by weight, the whole damn bunch.
The cases were bought in two large lots, and when weighed out, they separated into two lots, with a few stragglers. The whole bunch was +/- 1.04 grains, and each lot, when taken separately, was +/- less then 1/2 grain.
Neck run-out is very good, and heads are harder than normal Rem cases.
It might be because Remington makes a run of 222 Mag brass every-so-often, so they start with a clean machine set up, run the cases, and tear it down... where-as normal cases are made continuously until the cases start being out of spec, then the machine is reset - but that allows a lot of close to out spec stuff to go out.
Same with Winchester 6mm Rem - they make a run of it every few years (it is sold before it is made)... and the stuff is super great.
Anyway, I have no issues with Remington 222 Mag brass, and if you are good at sniffing stuff out, there is Norma 222 Mag brass floating around - but it is hard to find.