I shoot both the 155 and 167gr. Lapua's. I like the 167gr. HPBT's, as sunray says they perform roughtly the same as a SMK. I load it with my standard 168 load, 44gr. Varget, the 167gr. bullets goes about 2670fps at the muzzle. I've only grouped them out to 200 yards, but in my custom 700P I was averaging less than half an inch at both ranges for five shot groups.
Good bullets, not that expensive compared to other match bullet on the market, but you get what you pay for in life.
Give Peter a call and he can help you out, he's a great guy.