Congratulations on your new purchase.  You got yours around the same time as me, so I'm curious how yours fares.  I've got about 150 rounds through mine (GP40, not L model), and no mag-drop issue yet.  Shoots S&B FMJ fine.  I think you'll like yours.  Good luck.

New to forum (and to 10mm).  GP40 is my first foray into the 10mm world.

I do like my CZ DA/SAs, and wish they made a 10mm.  The GP40 looked like the closest thing I'd find to that, so I gave it a whirl.

I like mine - grip bite is a bit too aggressive, but I'm managing.  As others have said, the disassembly / reassembly takes some practice.  I've not had the mag drop issue, but I haven't tried anything over 180gr or any hot loads.  Bought mine in late Nov, so maybe I have the 'magwell fixed version'.  Mag release spring is very stiff.

I've only shot factory so far - maybe 150 rounds, with about 100 in FMJ (S&B and Magtech) and 4 different defensive loads.  I have some 200gr projectiles that I was going to handload.  Used to loading .40.  Now that I have some fired brass, I can give it a shot.

135gr Corbon (1400+ fps) is very fast and very loud.  It shot the most consistent (for me, of the 4 HP brands I tried), tested at 7 yards yesterday.  Large, clean holes.  Apart from the initial flyer that surprised me, it was good.  The Fed Hydrashock was pretty consistent as well, but a lot quieter and the brass mostly landed at my feet.  In any case, I have some more testing to do.

Anyone had the issue of the last round in the magazine failing to chamber reliably?  I've had this a couple times, and is currently the only issue I find disconcerting, to where I'd not trust it in a defensive situation yet.  I only have 2 mags, and it happened only 2 times yesterday, which is less often than the first range trip (mostly with Magtech FMJ).  It might be a breaking-in thing.

Holster is still up in the air - would appreciate recommendations.  If I did carry it, it'd likely be OWB camping/in bear country - not CC.