We have covered this in the past indirectly - and I admit always to carrying ''large and heavy'' ..... my choice, because my carry options allow it and also I like the greater control and accuracy implicit for me in that standard.
However while appreciating many folks have limitations re dress, environment etc and have to downsize .. what does anyone feel is the max practical size, for them - given that they are free of all constraints to do with concealment problems.
I think my 226 ST is about ''it'' - much larger and weight and dimensions could make for discomfort. That said - a 6" 686 in a sho rig is easily concealed.!
So - not so much cal in fact - more overall platform size - given free rein - what is your chosen max?