My Tikka T3 with 24" barrel chambered in .270 WSM is no faster weight for weight than my 24" .270 Win.
Not only that but the WSM's (I've owned the 7 WSM and the .270 WSM) were a pain to load.
I haven't even mentioned the fact that the WSM's have the less than optimal rebated rim on them too.
.270 Roy I'll give you. Very nice round.
To the original poster I'll say again that the plain old .270 Win WITH A 24" BARREL will give you more of everything than a 22" .270AI.
You have to pull the barrel to do an AI as well so I'd recommend either buying a 24" barrel for your present rifle or find a 24" rifle already chambered to .270 Win. They are plentiful for you right handers, not so much for us lefties.
