If you are all about winning, then the currently most popular Big Bore revolver would be the Freedom Arms, in any caliber you care to use from .357 Magnum on up to .44 Magnum. Oddly, nobody seems to use them standing. In small bore revolver class, Freedom Arms also dominates, but perfect .22 Revolver scores have been shot with both Dan Wessons and Smith & Wessons, so don't fret too much there.

What's extra good about Field Pistol class is that EVERYBODY misses. There has not yet been a 40 out of 40 shot in the records since it's inception. (Field Pistol Any Sight has had a few perfect scores, but they're super rare.) Sure, the theoretical best for these venues is a TC or BF single shot in .22 Hornet, but good scores can be had using nothing more than a 4" barreled .38 revolver. I've witnessed one good shooter get multiple hits at 75 and 100 yards with his 1 7/8" barreled DA only J frame Centennial type S&W. His misses weren't very far out either. He got at least one critter at every distance.

Quite frankly, metallic silhouette is more about making the most of what you have and having a good time than winning. Nobody else really cares what score YOU shoot at a local match, just as long as you are safe and not a boor.