The Smith is a weaker design, and has a history of weakness when shooting actual 357 loads. K frames were designed around low pressure 38 special loads over a century ago. The GP was designed for unlimited use of 357 magnum ammunition less that 20 years ago. The GP has a frame design that allows almost unlimited grip options, much like Dan Wessons are/were. This design was copied from High Standard revolvers that were released shortly before that companies demise. A GP100 trigger responds to competent trigger work the same as the S&W. The single action is a bit creepier, but that can be dealt with by (once again) a competent gunsmith. The GP100 is heavier than the K frame in all respects. Sometime back, factory 357 mag ammo pressure limits were downgraded by SAAMI in response to the friggin' S&W K frames going down because they weren't designed for such high pressures in the first place. S&W does make an excellent .357 magnum revolver, but it is not a K frame. If the K frames were so perfect, S&W would never have developed the L frame 686 in 1980, so late in the game.
An F250 and a Corvette? More like an F250 and a Vega. Great lines, but not suited to the task. I've had a few K frames, and they were neat 38 Specials, but poor 357 magnums. A quick glance at S&Ws website suggests that they no longer offer any K frame in 357 magnum. 22s,32s & 38s only. The calibers they were designed for in the first place.
