I read a post on here where someone from Barnes told a fellow that the 168ttsx opens up down to 1600fps. In a cartridge that doesn't really have the horse power I like for monos, would you run the 150 or 168 if it indeed opens at lower speeds. 308 is what I'm asking about and if I had my way I'd be using 150 megas but it has to be all copper.
Thanks
