I sort of expected the Kahr's to come up - I do have a PM40, great pistol. I've been carrying a P938 a bit more lately, getting spoiled by single action triggers, but I can't bring myself to accept manual safeties - it just doesn't fit my mentality for SD pistols. Getting into something with a DA/SA will be an advantage for my mental comfort.
So I HAVE shot the short 40 quite a bit, but not a short .357Sig.
I suppose to the point of "bridging gaps," well, frankly, if I sold off until I only had left the guns I NEED, I'd be able to buy a d@mn nice sports car after selling all of the guns I HAVE. I'm not to worried about spending another $1,000 on another pistol and kit.
Really just trying to decide whether I prefer to have my 500ft.lbs. KE in the form of a 147grn at 1250fps or a 180grn at 1150fps... I reload for both already, brass supply is the same for both too... I'm a "big and heavy" bullet guy, but this one kinda has me on the fence - kinda like how I'd rather have a .357mag than a .44spcl snubby, I'm leaning towards the .357Sig over the 40S&W, despite it's smaller, lighter bullet.
And for guys who don't know me, I suppose I should have mentioned, recoil won't be an issue. Either cartridge in a sub-compact will have less recoil energy than a .357mag steel snubby, let alone a 357mag LCR I carry around, or any of the 44mag, 454C, or .475Line revolvers with which I hunt. The PM40 and my wife's SR40c are pop guns compared to the rimmed handgun cartridges I run.
And also for guys who don't know me, I'm not a zombie apocalypse, SHTF, mall-ninja, prepper, tacticool, conspiracy theorist type. "I'm just a peckerwood that lives in the hills with too many guns..." - 'cept I don't have any hills...
But I AM in the market for a DA/SA, subcompact 357sig or 40S&W with the interest of carrying in larger crowds where my EDC Ruger LCP380 might be wanting for range and power, and I'm trying to decide which cartridge I favor...