William when I was a kid back in the early fifties and early sixties a lot of the old men still carried 25s, and 32s, and some carried the old long handled long skinny bladed knives. I later in life personally saw some folks shot with some of these anemic calibers and must admit, they appeared just as dead as the ones busted with a shotgun.
I for one carry a Model 60 all stainless Smith with 125 grain jacketed hollow points in 357 magnum, and I carry it every day. I think from my experience it is not wise to switch back and forth as each type of hand gun has it's own pointing characteristics and under stress muscle memory takes over PROVIDED your shooting technique has any ingrained memory. Switching back and forth RETARDS THIS MUSCLE MEMORY.
Do I shoot the Model 60 habitually with these loads? HELL NO! Your description of the experience possibly isn't strong enough but it is accurate. When I want to practice or just shoot, out come the light 38 special reloads. It doesn't change ANYTHING, it just makes it fun to shoot. Having used a magnum in a fight, I can assure you, that you will not notice the recoil or the noise. Your opponent WILL, notice, and be affected, by both the noise, and the concusion of the blast. Stats in police shootings, one on one show, that whom ever gets the first shot off regardless of whether that shot connects most times wins the fight. WHY? Most think it is demoralizing to be in a fight, and realize that your opponent is already at work, and you haven't got a shot of yet. My load will take any doubt from my opponents mind of my intentions.
Smaller guns? Can you really hide a smaller gun easier than a Model 60. Maybe, but what have you got in power and accuracy. In a Ransom Rest, a stock Model 60 will usually shoot hole for hole, target for target with a stock 6" Model 686 in a Ransom Rest BUT! In the hand, not likely. The shorter the barrel, the more critical the sight alignment.
At ten yards, a 1/16 " off barrel alignment in a six inch barrel, with the silhouette target still gets a hit, but that same 1/16" off in a 2" barrel will almost get you on the target next to the one your shooting at. I wore a Master Medal on my uniform for 18 years, but I know a handgun like the Model 60 is best used up close. It's what it was intended for. The smaller the handgun, the less distance from your opponent. That's how to look at it. How close do you wanna be?