I'm not saying your concern is unwarranted but... 2142 rounds a year = piss poor training. The civilian one day training classes I've attended required 500 round and I used 'em all.
This country needs more ammunition manufacturers!! The feds are running the price up!
I shoot a .22 conversion on my Beretta, and go through 500+ rounds per week...more during the summer. nice bang for the buck, IMO.