Ruger GP100 .357 Mag vs Smith & Wesson Model 686 Plus .357 Mag

These two full-size .357 Magnum revolvers are dimensionally close — within 0.06" of overall length, 0.8 oz of weight, and 0.01" of width — but they differ on the specs that matter most. The 686 Plus holds 7 rounds in the cylinder where the GP100 holds 6, and its grip stands 0.3" taller (6.0" vs 5.7"). The GP100 is the heavier gun by 0.8 oz, on an investment-cast frame Ruger builds with no removable sideplate.

Pick the Smith & Wesson 686 Plus if:

• You want 7 rounds instead of 6 in a frame that's actually 0.8 oz lighter than the GP100 — the Plus variant fits the extra chamber in the same L-frame dimensions as the standard 686
• You want the S&W trigger and the deeper L-frame holster and grip aftermarket

Pick the Ruger GP100 if:

• You want the Ruger's solid-frame build: an investment-cast frame with no sideplate and a triple-locking cylinder, made for a steady diet of full-power .357
• You prefer the Hogue Monogrip that ships as standard equipment to the 686's synthetic grip, and the 0.3" lower grip profile

Both are stainless steel DA/SA revolvers with 4.2" and 4.13" barrels, adjustable rear sights, and red ramp fronts. Both handle a lifetime of full-power loads. The decision is round count and trigger feel (686 Plus) against frame design and a 0.3" lower grip (GP100).