A word of warning / advice
I've only had a quick look through the above posts but....
I built a 5.6x57 from a .243 Steyr 72. I ordered a chamber reamer from Pacific tool, when it arrived I thought I'd check it against a case just visually.
The two were visibly different ! I then checked against case dimensions and that confirmed it as wrong, the neck was too small.
I contacted Pacific and they confirmed it was the correct reamer for 5.6x57 and I must be doing something wrong. I knew I was right so asked for their reamer drawing, which they wouldn't send, so I sent them a C.I.P drawing.
After many emails and phone conversations, it appears when they're asked for 5.6x57 in the States they produce a reamer with a smaller neck as everyone necks down from other cartridges because they can't get/ don't use genuine 5.6x57 cases, so it's kind of a wildcat 5.6x57 and not to C.I.P spec. They eventually ground me a reamer to my C.I.P drawing, but weren't happy about it and said it was at my risk as it's not what they normally do !
I use RWS brass in my 5.6 and it's lovely stuff. I'm still working up a load, N140 powder pushing 55grn Blitz Kings are being spat at 3600fps with the case just about starting to seal. I think if I got the case blowing out and sealing properly it'd be up around 4000fps which is not where I want to be. I'll either try a faster powder to get pressure quicker or go up on bullet weight.
My recommendation would be to get some RWS brass, it should last a good while so will be cost effective.
Good luck with your Krico, always great rifles.
Spotterdog
