.45acp by a significant amount followed by .357, then .40S&W and 9mm with.22 trailing up the rear. Also have a few guns of unusual calibers where I only have one or two of such as .25, .380, .38spc, .45LC, .44spc, .44mag and .500.
If my numbers are correct it looks like the 38/357 is the hands down number 1 of those responding.
1. 38/357= 22 say this is there no. 1 cal
2. 22RF = 14 say this is there no. 1 cal
Now given the forum we are on this comes as no big suprise to me, I'm sure if I asked this question on another group it would be much different.
A lot of folks have the 2 cals. reversed ( the 22 most and the 38/357 2nd most)
Also no big suprise the 9mm came in 3rd, but the big shocker for me is that it tied with the 12ga.
Thanks to all that took their time to answer the question.