The only time I ever really "saw" the difference between low velocity and high velocity was when shooting an old Parker I have at trap. The right barrel is cylinder, if you use standard velocity trap loads in it you won't break many targets, but if you move up to heavy trap loads you'll break plenty. It's not a trap gun obviously but I used to shoot it a lot and would use it on clays just to keep warmed up with the gun.

Destry

Out there at the crossroads molding the devil's bullets. - Tom Waits