There is only one 6.5 that's the 6.5x55 the others are just marketing hype by rifle manufacturers trying to sell new rifles, In modern firearms the 6.5x55 can be loaded higher than the original 94/96 Swedes
the new upstarts are already loaded as hot as they can safely go, if you go for a Tikka T3 the action is one size fits all so there is no weight saving, the 6.5/284 is a barrel burner and with a 20" barrel the Swede
is more efficient 6.5x55 brass is all top class stuff and factory ammo is available in most Gun shops, and it will handle the 140+ grain bullets better than the short cases for a bush load the Norma and Lapua 156 gr RN
bullets are hard to beat
Bookmarks