I'm in the planning stages for my next custom rifle. My first one was a .338 Edge (couldn't be happier with it) so now I'm going to the opposite end of the firepower scale. I've been looking at: .20 Vartarg or .20 PPC. Right now I'm leaning toward .20 PPC for two reasons: (1) I can shoot 55gr Bergers (if I can ever get them) in a 1:9 twist barrel and get some pretty nice yardage out of them. and (2) I can get the parts, except the bullets. By parts I mean brass. For some reason it's easier to get 220 Russian brass than it is to get .221 Fireball brass. I didn't say easy and I didn't say cheap but it's at least available. My questions are: (A) Why are the 55 gr Bergers so hard to get? (B) Why is it so hard to find .221 Fireball brass? I understand why .223/.308 and pistol ammo "parts" are hard to get... the fact that .22 LR is so scarce and expensive boggles my mind... but I really don't understand why .221 Fireball brass and 55gr Berger .204 pills are hard to come by.