Does anyone keep a notebook for their guns of rounds fired, kind of round, any failures, whether or not the gun was cleaned immediately, any other pertinent info? I just got home from my first trip to the range with my new (to me) Sig, and this thought occurred to me. It would be a great way to know the round count of the gun if you decided to sell it, know when certain maintenance might be needed soon, or know if there was some ammo commonality for any failures it ever had. You might also use it to describe your shooting that day, or thoughts on that particular range, etc. I'd like to hear if this is a common thing, or if I've stumbled on some brilliant idea.