Red Wolf Rosso

Realistically HP vs standard power was only really determined by how far they wanted to push the board, I am sure all Rosso's were GCU1's but again there is no reason why you couldn't fit a GCU2 and go for full 65FPE .22 or .25 or 80odd on .30 

It's a very fluid rifle the RW and it is what you want to make of it. I don't remember if the 50FPE rifle was made around that time for .22 I think it was only the original 30FPE, but again its only a barrel swap and a new or re-programmed board you could do 50FPE on a GCU1 board