A while back they had a pretty good article in RIFLE about the differerence bewteen the stanrd 22" bareled version of the 270 versus a 270 winchester with a 26" barrel.
First, remember a "B" with it's 26" barrel is essentually the same length as a standard bolt action 77 or 700 or model 70 in 270 Winchester, with a 22" barrel. So if you are used to a bolt gun, you give up nothing and gain a lot in a rifle the same overall length.
Next, if the 30-06 is a very well bore balanced round, then by definition the 270 Winchetser is just slightly over bore and as such id helped by a longer barrel and the ability to use.burn slower burning powders.
The upshot of the article was that you really could gain appreciable velocity and ability to better handle the heavier bullets with the 26" barrel rifle versus the standard barrel length of 22". The writer essentually ended by saying that out of a 26" barrel with modern slow burning powders the 270 Winshest should really be thought of as a Light Magnum without a belt.
That's that's ballistics side.
As for hunting with an "A" versus a "B"? There isn't a tree within 100 miles of here worth being called a tree. So thick timber and fast handling aren't a serious issue. The closest we have to hunting from a blind is sitting on the rim and watching the rim and the sage under it and seeing is a deer might be around.
I own a LOT of #1s. I own a few in the "a', "AH" and "AB" configuration but most are in varmint calibers and used as walking varmint rifles for stuff inside 250 yards and that might be carried for a while. I own 3 maybe 4 "A"s or at least 22" barreled #1s in various "hunting cartridges.
I own 20 or so #1s in "B" or "S" with 26" barrels in HUnting cartridges. I seldom hunt with any of the "A"s.
If you don't own either see if you can barrow one of each from a pal/friend. I for one don't shoot the light /short "A" nearly as well as I can shoot the "B"or "S" for me it's just too light and doesn't point as well and certainly doesn't "hang" as well for long range deliberate shooting.
That's just one guys opinion but I do a lot better with a rifle that is slightly muzzle heavy AND with the added ballistic advantage given by the 4" of added barrel, if I was to own only one or the other, I'd opt for the "B".
Ross
Ross