I have the CA Mesa in 6.5 PRC and its a real shooter. It's probably the finest rifle I have. Action is smooth, it's accurate and handles well. I've only put about 30 rounds through it, but I'm impressed. The factory 147 ELD-M put 5 shots under a quarter and the 143 ELD-M factory did just as well. I've got some 130 gr. Accubond and 130 gr. Swift Sciroccos loaded up and hoping to head tot the range this week.
I purchased mine at Sportsman's Outdoor Superstore. I'm not sure if they have the 300 PRC, but its worth a look.