That's a funny story OldTman
It's such simple pleasures that add great joy to the days of our lives. I don't have a big bore .44 Magnum snub, though I've been tempted to buy a Night Guard .44 Magnum snub, maybe one day. If you shoot .357 Magnum through your Smith 340 you may get the same reaction from shooters on either side of you at the range as you did with the .44 Mag, I did when I shot my 340!
One little pleasure I look forward is the good ol' switcheroo of shooting my .22 caliber 340, otherwise known as a 43C but IDENTICAL in nearly all respects to the 340 series, other than caliber. People will see a tiny little black nub of a gun in my hand as it goes pop pop pop while I practice with .22 ammunition. When they aren't looking, I'll sneak out the identical 340 M&P and make the switch, the resultant "BOOM" from that little monster firing .357 should make for some comical reactions when they scratch their heads wondering why the little black .22 pop gun I was firing suddenly begins thundering and roaring!
Another simple pleasure I've acquired, and I hate to admit this, (I feel so disloyal to the 340 M&P), is firing a sibling of the 340, a J framed all stainless model 60 in .357 that I have. My current hobby is using that diminutive snub for long and I mean looooong range shooting. I have only fired it out to 25 yards thus far and the range master says when I can keep all my shots in the black, in the bull's eye, he'll let me place the target out to 50 yards. My goal is to fire the gun on the rifle range out to 100 yards and beyond. Of course I shoot the gun single action at these distances.
The little all steel 22 ounce model 60 is, I'm also sorry to say, far more comfortable to shoot with .357 than the 340, AND I can shoot MONSTROUS Buffalo Bore Heavy .357 Mag ammo through it. Even out of the little snub I've read that they can achieve 1366 FPS with 140 grain ammo, and over 1200 FPS with 158 grain ammo, out of that snub barrel! I have not bought any of this hot stuff yet. I don't know why, but I thoroughly enjoy using this stubby little snub of a gun to shoot out to great distances. It's the challenge of it I guess.
A S&W 360 M&P snub is also in my future when cash permits and they resume production on those guns, but the gun will be too light for long range sessions with .357 the way the all steel 60 allows, not to mention I can't use ultra hot Buffalo Bore ammo through it. Still, I would like a 360 M&P at some point in time!
Okay, I'll finish this post with a great clip of the 340 M&P firing .357 that was recently posted to youtube, I LOVE WATCHING THIS CLIP:
http://www.youtube.com/watch?v=YHVH8vgLXQM