I have been shooting PD over the years and I have been on a couple where I did shoot about 800 rounds in a day. However that has only happened when it was a very big unmolested PD town(s) where there were lots of young and dumb pups hanging around one mound. In those cases I would say you would fire 4-5 rounds in a minute with a bolt gun. I think with all the pressure of more hunters, loss of PD's due to plague, and wild habitat; those large volume days may be gone. 20 years ago things were much better for high volume days. The last few years I am very happy with 300 round days. I have shot many different rifles 6MM, 6BR, 243, 22BR, 223AI, 223, 222, 17Rem, 17WSM, 17HMR, 22mag, 22LR. I enjoy seeing the hit, light recoil, suppressed shooting, and no RAIN. I now take a 17WSM, 204, 222, and 223 then a larger caliber if I want to try to buck the wind or very long range stuff. The long range shots are slow fire options where the barrel does not heat up past warm. I have learned that rimfires below 17WSM are often not clean one shot kills unless you are very close so I leave those for the sage rats (which are basically a miniature PDs). Take what you have on your first trip and you will figure out real soon if you want volume or distance for the next one. Barrels are just a numbers game dependent on caliber (unless you let the barrel get too hot) so there are always positive and negative's to any caliber. My favorite is the 204, 222, 223, 17WSM in that order. Good Luck!