The price of the ammo would be another factor keeping from putting that many rounds down range. With my Mosin, I'm buying surplus ammo at about $90 for 440 rounds (rougly 20 cents/round).
I envision my shooting routine to be something like 1/month fire 1 box of 30.06 and the rest of the month using the 91/30.
91/30 Mosin Nagant, P95 Ruger
M&P S&W .38, Savage 111 30.06
Springfield XD .45