You could certainly lose the 270 WSM, IMHO and the 26 Nosler would cover that apparent ballistic hole nicely..............however if the whole scenario has to make sense, then by all means take Dennis' advice, 'cause that is the most practical and makes the most sense. I personally have a love for the 264 WM and refuse to pay the price for Nosler brass........no need for a 270 anything with a 264 in the line up. Add your 257 Bee and 7 mag and all the bases are covered with style and no perceived holes that need filling. Reality is you have no holes now, but if you have a desire to play with the 26 Nosler, then by all means fly at 'er. That's the only justification I have ever needed. I have had every ballistic hole covered 10 times over for the last 40 years, from gophers to elephants but that has never slowed me down one bit.........I have at least one cartridge in every caliber from 20 to 50 (except 27 of course) from the 204 Ruger and 22 Hornet to the 50 BMG and have touched on the CF 17s briefly. They're just too tiny for my paws and I find fumbling around with them no fun at all, the 20 cal bullets are bad enough. Hell, I perceived a gaping maw between 224 and 243 so I had to build a 234 to fill it, several actually.......however this is now entering the "twilight zone" where any form of attempted justification is futile.......except for those jurisdictions that still use the 23 cal split for big game cartridges........there they would be fun just to harass and confuse the COs........