I'd do a 1-14" twist replicating the Standard Rem contour cut to 21" in an ADL Hunters Edge. The Whelen really doesn't need a 24" barrel and 22" would be my second choice. 21" is the number of God (3) multiplied by the number of Perfection (7) so you know it can't go wrong (grin).
Seriously, I just like the way the 21" works on a LA and in the Hunters Edge will look perfectly balanced against the very short forearm of the Hunters Edge.
To me, a Whelen is something built for packing and, again for me, that means light weight.
