We generally refer to all the various GP100s by that name, and specify fixed or adjustable sights, barrel length and "short shroud" variants, plus blue and stainless of course. Takes longer to say, but it beats trying to remember all the various variation numbers and letters Ruger uses
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Which means if you use the search button and use "GP100" as the search term for the "revolver forum", you'll get TONS of reports, commentary and information on 'em
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The vast majority of which will be favorable. These guns are tough, and thrive on a steady diet of "hot stuff" with no signs of quitting. Cor-Bon uses GP100s as development testbeds for their 357 ammo, and haven't broken one yet
. They have an interesting mechanical advantage over most S&Ws in that they "lock up" at the crane as well as the back of the cylinder; Dan Wessons do that, as does the Taurus "Raging" series large-frames. They can also be completely stripped by the user, the frame lacks the "side plate" weak spot on most S&Ws, there's a lot of good news...toughness is unbeaten in the size/caliber class, and seldom matched.
Accuracy usually equals that of the same barrel length S&W K or L frames. Only the Python and some larger-frame Dan Wessons consistently top it by a bit, at least among DAs. The GP100 generally kicks your average auto worth up to double the money's butt in terms of group size
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Downsides: not available as a 7-shot, where the equivelent S&W and Tauruses are. Triggers are sometimes a bit rougher than some S&Ws but respond well to user-installable spring kits or just a lot of dry-fire, which won't hurt 'em a bit.
Aftermarket grip and holster support is fair to good, sight support is good with Ashley doing a lot of good sights. There's a good ghost-ring rear sight available dirt cheap, the "OneRaggedHole" sight...it's a replacement blade for the factory rear sight, less than $20. GP100s eat out of the same speedloaders as an L-Frame S&W, so those are widely available.
If you want a longer-barreled general use piece that can serve as a "woods defense gun" against anything short of a Griz, the 6" GP100s are superb, utterly unmatched in their price range.