I know, the idea of moving from 9mm to .45 in this day and age would draw a few frowns. I've been using a P226 9mm for a number of years for duty, and a P239 9mm for off duty. Prior to that used a P229 .40(duty) & P239 .40(off-duty), and a P220 .45(duty) & P245 .45(off-duty). So, I have been there, done that in terms of trying out all that I was authorized to carry for my agency. Skill-wise I am well above average in my agency in speed/accuracy/reloads, and have excelled at what ever pistol was in my hand. I try to get to the range once a week to shoot if I am able.
That being said, I really enjoyed using .45acp, but I kept running into the handicap of the low capacity on the P220/P245. So, from a practical shooting point of view the P220/P245 got dropped, and I moved on to a more comfortable capacity level. We recently were approved to carry the P227 .45, so that opens up the .45acp option again. Ammunition is not much of a concern as I have access to agency ammo, and reloads if things get tight. My current duty station is mostly traffic enforcement, so lots of intermediate barriers.
Generally I find it hard to get an open minded opinion on matters like this since the .45 guys and 9mm guys won't budge from their camps. I find that LEO opinions can sometimes be a little more enlightening. Not a caliber war here, just looking for some tactical advice for duty belt equipment.