The primos is very similar to my bog pod tripod, they're perfect for hunting, caldwell is a bigger and a heavier platform but its versatility is better (you'll need a person who carry it on field). I use caldwell when recording hunting shots with the RAW, the bog-pod when recording with my edgun (smaller and lighter rifle), and when hunting and not recording, i use a vanguard bipod. with my RAW shooting @925 fps i get 50 regulated shot plus 5 more off regulator but still above 900 fps when filling it up to 230 bar and let it fall to 140 (reg. Minimum preassure), i can fill it up to 250 bar but in none of my pcp's i did that, always 15-20 bar under the max. Preassure. (I only use jsb kings 25.39gr and for close range hunting sometimes i use the polymags for superior knock down energy).