Here is my meager collection of Rugers......starting at 12 o'clock and working clockwise:
1) OM .22 Bearcat
2) NM Blackhawk .45/.45acp convertible 4-5/8"
3) OM Flat Top .357 magnum 4-5/8"
4) Vaquero .44 magnum 4-5/8"
5) NM Stainless SBH .44 magnum 5-1/2"
6) NM Blackhawk .357/9mm convertible 6-1/2"
7) Vaquero .44 magnum 7-1/2"
8 ) Bisley .44 magnum 7-1/2"
9) NM Super Single Six .22/.22 magnum convertible 9-1/2"
10) NM SBH .44 magnum 10-1/2"
This is my OM .22 Single Six. It started out life with a 5-1/2" barrel, but I had it re-barreled with a 9-1/2" tube:
This is my .44 magnum Bisley Vaquero. It started out with a 4-5/8" barrel, but I had it re-barreled with a 7-1/2" tube.
Last, but not least, is my 6-1/2" OM Super Single Six .22/.22 magnum convertible: