12.2 is pretty low capacity wise, I have Privvy and frontier brass and they'll take 13 grains no probs, I was chatting to a guy at the RFD the other day and he uses Remington brass and gets 14 grains behind a 45 gr bullet, this is well above hodgdon's max load though so not suggesting anyone tries it.
They seem to have started 35gr v-max production again as there's been a delivery so hopefully they won't be so hard to get hold of now, I had 500 on back order and got 300 and I see dauntsey guns have some in stock too.
I've got about 600 now so that will keep me going for a few years even if they're still slow to come.