FS, I'll be glad to take that brass off of your hands next time I see you. I will put it to good use. I found 2 boxes of 270 that have 6 + 7 reloads on them respectively, and discovered a neck crack, so I will be replacing them with the new brass.
WR, Nice dirt bike, wish I had one of them!
WR, yes I use IMR 4350 in the 270 quite a bit. Generally, 55 gr to push a 130 gr slug. Works well. (that load was with the NLA Win 120 primer).
There is hardly a cartridge around that I can't find a good load for with just one of two powders: IMR 4350 and IMR 4064. (I load 223, 220 Swift, 270 Win, 270 WSM, 30-30, 30-06, 300 Win Mag and 348 Winchester).
That said, I prefer H-335 for the 223 and Reloader 22 meters + dribbles extremely well, and is very well suited for the 270, 270 WSM, and 300 Win Mag.
I used to load the 300 Win Mag with 70 gr of IMR 4350 and a Win 120 primer (NLA) and could stuff either a 180 or 165 gr bullet in front of it and get consistent 5 shot 5/8" groups at 100 yds.
I also often choose the IMR powders for hunting because they are supposed to be less temperature sensitive than the Reloader powders. In reality, you likely will not notice the difference.