Bruce,
The Valmet is almost certainly a 14 twist, I have owned a couple 412s that were, but the 63 SMP should still work well in it. If you don't have a Sierra manual I can send you the data it lists. Hodgdon also lists data for the 63 Sierra. I've used that bullet on a bunch of deer in 22 CFs and it's hard to beat.
If you want to use a 55 then I would first look at the 55 hornady Sp with cannelure. It's a tough accurate little bullet. Truthfully at Duece velocities about any 55 grain bullet will work.
Last edited by Dude270; 09/03/15.
