I don't see any point in re-barreling a single shot the size of a No. 1 to a short action caliber like the 6.5-.284. You're not saving any length or dealing with a magazine length restriction. Why not save yourself some money and re-bore to 6.5-06? It's the same basic cartridge ballistically.
Then, I take it that you've never owned a #1 in .22/250, .220 Swift, .243 Win, 6mm Rem, .257 Robts, 7mm/08, .308, or how many other short action chamberings that Ruger has factory made?
To me that agrument doesn't hold any water... If a person wants a s/a chambering in a sgl shot, WHY NOT? It's what he wants... AFAIC, that's the whole purpose of having a custom #1... To have what one wants...
I have a 1-A in .338 Fed. because I wanted it. Also have a #3 in .338/06 Ack. Imp. Same reason... Have one in .356 Win, and one .35 Whelen. Again same reason.
I'm sure someone, somewhere, has rechambered a #1 in 6mm Rem or .243 Win to .240 Wby using your philosophy... But if Ruger had only made them in .240 Wby... I'll bet a lot of customs would have been made in .243 and 6mm...
I also have plans for a #1 in 6.5 Rem Mag. and NO I
DO NOT want one in .264 Win Mag. And before you ask, ... Yes! I also have one in 6.5/06...
Why? Because I want one, and I can...
So, if the original poster wants one in 6.5/.284, I say: why not? One should have what one wants, and we should be thankful we have the freedom to have what we want.
GH