I was thinking of building a 6.5 Rem Mag off of a Rem 700 338 Win Mag action. I am trying to get the best bang for the buck as far as the price of the build so I chose this round as it has the same bolt face of the Rem Mag but basically duplicates the 6.5-284 in performance. My question is when I tell the gunsmith what I'm building and since its a short action round going into a long action, would he know about the chamber depth to get the long skinny bullet seated out as far as possible. The reason I ask is that looking at the 6.5-284 it is nearly the same case length as the Rem Mag but has an overall length of something like 3.310 where the 6.5 has one of 2.8 something. Is this a possible build or is the 6.5 Rem better off built on the short action.