Depends on the goal of the moment. But I have shot them all except the 20" 338 which, like I said, I kind of forgot that I had. I was going to fix that this weekend but I had some family stuff come up and couldn't shoot it.How many of those barrels do you actually use?
And how do you handle the different scope zeros for each one?
As far as different zeros, I did take a day in January and swap through several of them to record the offsets. Each of my barrels has its' own dope book and the zero is recorded there. Elevation is relative to where the scope bottoms out, eg "73 clicks from bottom" etc. Windage is similar but you gotta be careful not to jack up the internals.
Once I get the rest of my data together I'll have a better system but for now I just picked the 26" 308 as my zero barrel and everything else gets offsets put in to the kestrel profiles. By the way, the difference in elevation between the 308 and the 338 is 2.7mils, which was surprising.