I have a friend who is convinced that one should only practice one gun at a time. While we have all heard the expression about "be ware of the the man with only one gun" I always assumed that practicing similar drills with with my Glock 19 and then a pocket auto (baby Glock or Boberg) would be "similar practice" but perhaps not. I assumed that most practice should be done with the full size but some "familiarity practice" with the smaller gun would allow some skills to transfer, perhaps one should only focus on one gun at a time.
What about different guns on different practice days? I have a new to me K frame that I was going to work on revolver skills with. My thoughts was mostly Glock practice one day and mostly revolver practice the next but again perhaps I should have more discipline in my practice routines.