I bet if you offered him to shoot one he would have accepted. Oh Sorry, NO. Cant break your rule.
I generally have more than 5 pistols and enough ammo (easily 500 to 1000 in 9&45 each) for each caliber. and those would be 380, 9mm, 45 acp, 38 Super and 22LR. Range day for me is 3-8hrs at my outdoor. Last Friday I had some testing on a new build with a variety of reloaded ammo. Learned some things for that pistol and fixed something there. Spent a couple hours talking out of the 6.5 hours that day. Casually shooting, not worrying if my time was up. Storm blew in and packed up. Spent another hour till dark talking to the RO on the last shift about Club happenings. Thin I shot 2 (16rnd) mags in the P01 at the end and the rest of the time was on my 2 officers 3.5in in 9mm and 45 ACP. Filled a coffee can of brass in the end. I don't know... 700+ and about 60/40 9 and 45.
I never shoot only one. If perfecting only one gun is your goal, standing at a table shooting it at a single target is not the way to practice. If I am alone I will use more than one stand for targets at different distances.