cwtebay, if you're going to shoot cast in it, the 300 Ham'r is the bee's knees! What's not to like with a 15-twist and real boolits? Catch a sale on Wilson Combat for a good barrel. Think about it - the 32 Win Spl with a 16 twist easily stabilizes both the RCBS 32-170-FN anf the Ranch Dog 170. If you can get a boolit to feed and function, 125-180 gr, it might suit you just fine. The RCBS 7.62-130-SPL works really good.
The 7.62x40WT is no slouch either with cast. Standard twist for them is 12.