So looking at the ADI (and many other loading data tables) the 'test' rifle that the data are given for is 24". If my barrel is 22" (Tikka T3x) then should I consider that the given velocities for my shorter barrel will be slower?
In which case should I go for the 'faster' 2206H over 2208 so that I get the velocity I want without having to load it up too much?
This is based on the Sierra information for 45gr Sierra Spitzer being most accurate with a 2208 equivalent powder getting 3600fps.
Hope that makes sense.
Cheers,
Paul