Thinking in terms of carrying it a lot through the woods with plenty of "rests" to shoot from, the "A" weight makes a lot of sense to me. It will be a bit nose heavy anyway with a barrel that long. Swamped makes sense.
I'm looking to build a .32 x 42" poor boy squirrel rifle. The Rice barrel I've chosen isn't cataloged either; it's their "squirrel" barrel and is swamped. I like light weight, within reason, for carrying purposes. A rifle can gain weight fast after the sun has been up a bit.