jgcoastie's own words, "Hate", "despise", vehemently against", apply to the .25-06, for me. It's such a useless, over-bore cartridge.
The .270 is far from efficient. Standard velocities for the .270 Winchester could be achieved with far less powder, in a smaller case (.270-308, .270 Roberts, etc
). But the .25-06 is even worse. It's horribly over-bore. Bullet selection is crap. And all the owners think owning a .25-06 gives them the right to pee in everyone else's Cheerios. I don't know where the attitude comes from, but I only ever notice .25-06 (and .257 Weatherby) owners doing it.
I love my .270 Win; and often wish for slightly better bullet selection (such as 7mm or .30 caliber). But... I'm glad it's not a .25 caliber.
There are more bullets available in .25 caliber, than .277", but the usefulness is limited. There is so much of a velocity spread between all the .25s, that there are only a handful of bullets appropriate for any given cartridge. From the .25-20 and .25-35, to the .250-3000 and .257 Roberts, to .25-06, to .25 WSSM and .257 Weatherby, there is just too much disparity in velocity ranges.
Useful bullet selection sucks.
The .270 Win is outdated, inefficient, and arguably obsolete. ...But so are the .30-30, .30-06, .300 WM, 7mm Rem Mag, and nearly any other cartridge you can think of, from the first 70 years of the 20th century (and a few decades in the 19th century).
Nearly everything we shoot today was created with other powders, bullets, and metallurgy in mind. Yet, we still shoot these cartridges, because they get the job done (and there are so many older firearms still going strong).
When it comes to efficiency, taking a step back in time, nearly 100 years, is becoming more appropriate than ever. For example: With modern firearms and powders, the .30-40 Krag is a much better .30 caliber cartridge than the venerable .30-06. It's efficient, strong, can reach '06 performance levels with modern powders, cheaper to load, and cheaper to manufacture (assuming mass production, and based on being a rimmed design - which allows looser tolerances in case body shape during production). Yea, the .308 can do it, too, but who wants
that worthless cartridge?
As much as I dislike the .25-06, I won't tell you to stop shooting it. If that's what you want; that's what you should use. I'll stick with my .270 Win, .30-40 Krag, .327 Federal, and keep debating whether I should continue with my .270 Krag and 9x54R.
Can you tell I'm not a .270 fan? Why? I get sick of a bunch of guys pushing a caliber on people that really isn't all that fantastic. You see it at gun shops, you see it on the internet, and you see it at the range -someone claiming that the .270 is the best round in the world. The .270 can kill as well as most hunting rounds, but it really doesn't do anything that special. It gets way more hype than it deserves.
I feel exactly the same way about the .30-06, 7mm Rem Mag, .338 Win Mag.... Oh, the list will go on forever. You name a cartridge that gets a lot of "it's the greatest thing since smokeless powders" hype, and I feel the same way.
Find something you like, that does the job you need it to do. It's that simple.