I am building or collecting parts for the following builds. 1. 17-223 2. 6.8spc 3. 308x1.5 barnes 4. 458x1.5 with a rebated rim.
the 17-223 will be pretty easy just a necked down 223 I have got the forming dies and the sizing dies, I bought a k-var bulgy bolt and mag. I am deciding what barrel to use and also the reamer It will be built on a Rommy trunion.
the 6.8 spc will require a lot more work it may need a opend up 223 bolt and it does not appear to fit any AK style mag may have to mod a 6.8spc AR mag. I have a stainless varmit barrel 24" long I wil do this on a yugo as the champer pressure is up there.
the 308x1.5 barnes is basicaly a 308 win cut down. I have some of the dies to make the round and a stainless 30-06 barrel that I plan on rechambering. the 308x1.5 will out perform the 7.62x39 round by aprox 300 fps with any given bullet and since it uses 308, 30-06 or any simular brass as a parent round it wil be cheap to load. it will also allow me to use .308 bullets that are avalibale in a larger selection. I am also looking into the posibility of a.311x1.5" version done on a rechamberd nonchrome ak barrel. this one will be done on a Yuco kit as the pressures are up there as well.
the 458x1.5 is just in the planing stages at his point. I have a 458 win mag barrel to rechamber this is about the same as a 45 siloute with out the rim. I plan on taking 458 win brass or other mag brass cutting it down to 1.5" I have read that it can be formed with 45 colt dies. I dont think that it will do any thing that the 458 SOCOM or the 50 beowulf cant. it will be a hey look what I built type deal.