Extreme Benchrest?

Best to bring your own tank. There are tanks on hand but in my case the ones on hand filled 10x faster and I ended up overfilling my rifle right before an event. I was able to shoot the air down but something like this could break your concentration. Also, if you are using the gauge on your tank to measure the air, there could be a slight difference and could effect your shots. If you're using the gauge on your rifle, should not be a problem. They also have compressors on hand to fill your tank if you want. Left my tank in the truck.