Back when I started, I did not feel undergunned with my 5 shot .38 and a shotgun. It was a different time. But I practiced alot with that gun - which I still have and shoot!
When I retired, I carried a SIG 220 & two spare mags, and a Steyr AUG 5.56 3 shot burst with 3 spare mags, and still did not feel undergunned. But I had been the lead instructor at our academy in Firearms and Officer Safety and Survival for 9 years by then. I put a lot of rounds through that AUG, and the SIG.