I try to keep my guns limited to one of 4 bullets...
I stick to 4 rounds
45/70 Govt
357 Magnum
17 HMR
12 Gauge
My gun List is
45/70: Marlin SBL, Marlin CB, Magnum Research BFR
357 mag: Marlin 1894 18 inch barrel, Marlin 1894 22 inch barrel, S&W 640, S&W 627, S&W 686, Ruger New Vaquero, Bond Arms Derringer, Coonan Classic
17HMR: Remington 597 (exchanged for a Marlin XT17VSFL but still waiting on the return) Taurus Tracker
12 GA: Remington 870 and an old Stoeger SXS that I may some day turn in to an NFA SBS.
the bad thing is I cant keep my wife to follow my rules and she owns a few guns in different calibers. Particularly a Sig P238 (380acp) and a Taurus Judge (410 shot shells) and my oldest boy asked me for a Ruger 10/22