I'm curious as to what a 338 RCM, 20 inch barrel could do with the Woodleigh 300 RN? If it could get to 2200fps, it would be in the category or the old .333 Jeffry! Since we have these newer powders, I thought maybe someone had crunched some numbers or scratched their head about this? I can find 250gr data. N550 really steps it up. How available is N550?