Re: 240 page super pooper??
Dusty, I think it was Fiftydriver that mention a 6x22-250 (6x250) to someone awhile back. I just picked up 2009 Hodgdon manual and they have loading data for the 6x250 using 1/8 twist barrel or you could do a 6x250AI.
About 20yrs ago I decided I want to shoot 1000yd first was a 6x284 then a 6Br good thing I didn't build a full blown match rifle I just didn't like it VLD were all that great back then. Today you have the best 6mm bullets good barrels/brass and good gunsmith here on this site that can build a LR rifle.
I'm not knocking your gunsmith but if you want to build a LR rifle go to the gunsmith that build them. My gunsmith builds a great hunting/varmit rifle for me but my 6.5x284 was build by someone else.