I have started drawing up plans for a bolt action. It will be just big enough to cycle a 221 fireball with long or heavy bullets. It is very similar to a rem 700 but: Smaller,.5" bolt body and 1" total action width X ~5.5" long), left hand feed port right bolt, side bolt relese, sako extractor, and fixed blade ejector,unless plunger ends up being more practical). My questions so far are: What type of steel for action and bolt,harden bolt head)? This action will only have to handle the .221 or a .20/.17 variation. What clearances are needed between bolt lugs/body and the raceway to be tight but still move freely? Also what would the minimum barrel shank length be? I have it drawn up as aprox. 5/8" depending on bolt to barrel clearance.