after getting my 223 varmit build done. I am now looking at the PPC line of ammo. 6mm .22 .20 &.17 PPC rounds are made from 220 russian. the 220 Russian is derived from the 7.62 x 39 Russian by necking it down. The 6mm PPC is considerd the most accurate in the world at 200 yards in bench rest.Tthere will be some pro,s and cons to this build the pro,s are 1 the bolt can be used as is from the AK 47 so I will not need to spend $70 for a 223 bolt. 2 the mag should work as well. 3 the rest of the kit with the exception of the barrel and possable the bullet guide should work as well.
The cons 1. the cost of ammo will be very high must be reloaded 2. will require A custom barrel.
I found a set of 22 PPC rcbs dies at a local sporting good store missing the directions for $10.00! a local gun smith has a reamer and will ream a chamber for $55 or I can buy my own reamer for aroud $100. If I decide to build several guns I will buy the reamer. Lupa sells 220 russian brass but it is not cheap. I am looking at necking down and reforming 7.62x39 brass for varmits and using the good stuff for bench work. I am not positive the 7.62 x 39 can be used I am just getting into relading I have read that the 6mm PPC can be done for sure. this ammo will not be as accurate as the lupa based brass as it uses a larger primer hole is not as concentic and all of that. I have heard that fire forming is the norm for good accuracy how ever good groups are seen while fire forming. I suspect that for it cycle reliably It will need a some what loose chamber and a no neck turned throat. I woud apreciate any input from the reloaders out there before starting this build. I plan on using a comercial take off barrel and rechambering it first. this will again be a heavy barrel varmit set up scope only build taking what I learned from the 223 build.