Model 442/642: steel cylinder/barrel, aluminum frame, 15ounces

Model 340PD: titanium cylinder, steel barrel, scandium frame, 12ounces

Model M&P 340: steel cylinder/barrel, scandium frame, 13.5ounces approx.

Put those in there for reference... So between the 642 and the M&P 340, for example, the weight you save is about 1.5 ounces. I personally really can't tell the difference very well. So how does the strength of the aluminum frame compare to scandium? Obviously, the 442/642 cannot fire .357 magnum but that's irrelevant to many people (including me) in this light of a revolver I think.

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Aaron Terry