Marc covered the main bits above, I'd say. The only bits I'd add is to load the CO2 with the gun inverted or slanted so that gravity does some of the work for you and to cup the slide when you release it to change mags so it doesn't thump up against the stop- it feels good to have that "clack" but you'll get less wear by damping it. I tend to use pellgun every three bulbs, but people all do different things and a lot of people, like Marc do every other one with no problems- oh, don't over-lube...you just need a drip on the top of the bulb