This thread was long since silent, but for reference, yes the 6.5 WSSM is a viable and smart caliber. Infact, I went one bigger, and made mine a 7mm I'm calling the 7mm AIM. WSSM case, 30º shoulder, launches 180gr Berger VLD's (BC .684) at a forecasted 2750fps from a 27" tube. Currently only tested with H4895, providing 2650fps on 40grs, next powders are 4350, Varget, and Retumbo. Heck, might even make 2800fps, combine that with a .684 BC and you're reaching out to a mile supersonic. Not bad for 40 some odd grains of powder. Those short cases really are efficient, and super low recoil and blast.