AusVarmint

Thinking of gett a Martini .222 rimmed can anyone give me some hints on loading for this as i ahve no idea what so ever

Any in fo would be help full

Thanks Mick

Hi Mick

The 222 rimmed will do pretty much the same as the standard 222, Brass is a little expensive as there is only one manufacturer Bertram, check out Jansa http://www.jansa.com.au/bertram3.php Good thing though like the standard 222 its very easy on brass with very very little stretching I have found.

The Bertram Brass is slightly heavier than than the usual 222 brass so its recommended to knock 1 grain off the standard 222 max loads.

I had issues with mine due to a slow twist barrel 1:16 prob more to do with its age than anything and just means no fancy Boat Tail Plastic tips in 50gr for me, looks like the 40's are okay though and have had some good results recently with the lighter proj's like 40gr Noslers, sierra's HP and even the little 35gr Vmax.

I have been using 2207 which it seems to like.

If it has been smithed well then the trigger should be fairly crisp and extraction should be good, I had some issue's but that was trying to push the 50's hard to get them to stabalise and had a couple that didn't want to extract.

Ryan

You've got to take it easy on the brass as if you load her chasing 222Rem velocities cases will often stick. I'm running a 222Rimmed AI and treat it as a super 218Bee. Damn accurate little beast too with cheap Highland 50gr pills. For the regular 222Rimmed you use 222Rem dies with a 357Magnum shellholder. It's a great little cartridge but not as simple to feed as say a 222Rem or 223Rem. Mine runs a 1:14" twist and allows the 50gr pills to be used with ease.
Cheers...
Con

ooh yeah forgot about dies the other shell holder is a 38 special. Bit of annoying but really the extra I had to buy was a 38 special trimmer and a 222. I have just been using cheapo lee RGB dies and full size each time to make sure they extract.

Thanks for the info guys that is a great help.

Cheers Mick.

correct me if I'm wrong as I dont have my copy of manual cartridge conversions handy, but I think .222 rimmed can be made from .357 Maximum brass. All that is needed is an anneling step and one pass through a .222 rimmed die? Might be a way for you to make cheaper brass if Bertram is too dear, or just somthing to toy with.

I was looking at doing a rimmed .17 Mach IV, in a number 1, by using .357 maximum brass run into a .222 FL, then a .221 fb FL, trimmed to length, necked down in stages (.20 & .17) and finaly run into a .17 Mach IV FL die, then I'd have to neck turn. I gave up on the idear, just too much work for no real gain.

Might work for you

Steve

Aussie steve wrote:correct me if I'm wrong as I dont have my copy of manual cartridge conversions handy, but I think .222 rimmed can be made from .357 Maximum brass. All that is needed is an anneling step and one pass through a .222 rimmed die? Might be a way for you to make cheaper brass if Bertram is too dear, or just somthing to toy with.

I won't correct you

It sounds easy, but to go from .357 to .224 is a big step, .17 is even bigger. I tried some for an experiment and lost quite a few, more of the annealed ones than the non-annealed ones.

Jeff