Yes, I do it as a necessity and because I enjoy it. I teach rifle, pistol, shotgun, subgun and precision rifle to a cross section of students who are very experienced individuals that may utilize a variety of weapons. Because of this I have the need to stay highly proficient on all weapon categories and weapon manufacturer / types that I generally encounter. I also enjoy it. It means I spend a lot of time on a range shooting, but I am provided with the time and resources to do it and I also get a paycheck. Might I be a better shooter if I focused on only 1 thing? Yes, of that I am sure as I am narrowly focusing on the Glock pistol right now and my skills sets have very much increased, more so than even I had anticipated, but I do enjoy shooting for the fun of it and I like shooting a variety of weapon types. I need to do it while I am still getting paid to do it.