I've read that a Ruger GP is about the same size as a Smith 686 (L frame)? The Ruger Security/Service/Speed Six is described as a tad smaller than a GP (but bigger than a SP), and a Smith M19 (K frame) is described as a tad smaller than a 686 (but bigger than a J frame), so it stands to reason that the Sixes are comparable in size to the K frames? Yet, I just saw a clip on youtube where they were comparing the Security Six to a 686 and they looked pretty much identical in size. Can someone clarify how these guns stack up in size? Much obliged.