RE: .25-06 deer load
I don't have a 2506 currentlybut FWIWa good friend does he uses IMR4350 (shade over nosler max) with 100 NBTs(longer range deer and yotes) and 120 NPs (deer,etc), while the velocity is not tops for 2506 they both produce tiny groups on paper.
I think your best to be looking atthe NPor going with 120gr pillsfor deer.No need for a light for cal, boattail or polymer tip design, at these ranges.
Side note: I thought you bought/deceided onthe6.5x55 (if memory serve me correct it was also a Tikka)??? Letus know how it shoots! I wasweighing very heavy ona LH T3 2506, nice rifle but have it in my mindI want at least a 24" tube for its application.