Don't use an H nub with PDI w-hold. It will give bad results. Also Bioshot makes .32 and well as .36 in bio but the .36 are always out if stock.
From what I've read in the past, it's more than that- I think around 650 if I'm not mistaken.Is that not a 600fps srping?
We typically use 0.25g with that power in HK. We find it more than sufficient and provides the speed in the smaller fields over here.I use .3s at 350-400 fps. That might be a little low for most people, but there ya go.
I would install an r-hop and an LRB, but that is just me.