Re: 220 Swift Improved?????
Even if you do gain 230 fps more than my standard swift with 55 grain bullets, my point was that it really has no advantage over a Swift improved or a regular swift that has a fast twist and shoots 75+ grain bullets. My 22-250 AI fast twist (which has roughly the same case capacity as the swift)DOUBLES the effective killing range of my swift shooting 55's, and the larger bullet passes the lighter bullet at under 600 yards! It also stands to note that the swift improved slow twist would burn more powder than the swift improved fast twist shooting heavier bullets and thus reducing your barrel life a touch. You have noted that you already need a new barrel.
I do agree however that the improved version of the swift would be a heck of a lot easier for brass prep as it would nearly eliminate the nasty taper of the standard swift. Trimming and FL sizing would probably be decreased by half!
If it's not far, it's boring.