Thanks Bill. Good advice.

Barrels are 24" long. I like the idea of a compact but potent package. Still not decided on sling swivels though (see other thread "slings on doubles").

Regulating with Norma does seem the most sensible choice, although Hornady is the only brass I can find available. I'm not sure this should really matter, but in terms of exactly duplicating the regulation load it complicates matters slightly.