I found a deal on a bunch of 175gr SMK pulls online bought them think I could use them for 308 plinking and hoping to find a (sub sonic )
300BO when I get the stamp !
My Sierra manual doesn't list a sub sonic load with that bullet. The lowest it shows is 1200 fps, and that is listed in the 300 Whisper data. You might find something here. 300blktalk.com Lots of info there about the BO.