Hello: I've decided I want a fieldcraft. My choice is the 6.5 CM chambering. Next decision is either the 18.5" barrel or the 21". I like the idea of the 18.5 for portability. To those in the know. In that chambering what approx. velocity loss will I experience going to the shorter barrel? If I work up handloads what would be the recommended powder for the best performance to make up that velocity loss? Question for all Fieldcraft owners. Handling, does the model with the shorter barrel still handle acceptably or is it too muzzle light in your opinion? Thanks