Springfield and Kimber use the cone barrel approach not for accuracy reasons, but for those of function and durability. Seems they're a lot smarter than Colt, having been around for a lot shorter time, and had to "improve" the Commander by shortening it an impressive 1/4". The result is that the bushing required on a conventional barrel was too short, it's lug was too far against its rear edge, and a decent fit was next to impossible. Oh yeah - they broke a lot too. In law enforcement circles, things like this are often referred to as "clues"

Kimber, in their defense, never tried this route, but they never tried a 4 1/4" barrel/slide combo either - woulda been nice...
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