Hiya mate,
I imported a 470 from Germany in .177 and it's a mega lump of shooting iron. It obviously came at German power spec and I have literally put it in the rack for another day. From what I can see it's just a tarted 460 Mag. On reflection I think I might have gone for the 440 as it's more carbine and perhaps balances better. But I think the 440 only comes in .22 whereas I wanted .177. I'm sorry I cannot comment on accuracy/ performance as it has literally gone over the chrono and thats that.
It also has the black coating on the action- I dont think it's parkerised but that may be the process? In any case it's not blued and that disappointed me a bit.
Sorry I cant be of much help.
Dave