Least recoil - 148gr WC
Best practice - 158gr LRN or LSWC (IIRC, most .38spl revolvers with fixed sights are regulated with 158gr LRN for POA/POI)
Crimp jump - None that I've observed and I've put at least 50 rounds of nearly everything they produce in .38spl through a 637 Airweight.
Reliability - I've yet to have a FTF with Georga Arms ammo.
Price - Current pricing looks to be about 2% higher than it was in Jun-09 when I bought a vartiety of types to test the 637. IE: 158gr LSWC was $11.25/50 is now $11.50/50.
Brass - They use Starline brass for their "New" ammo. Great stuff for reloading -- and they make cast bullets too.
Overall - Great bang for the buck -- Try 'em, you'll like 'em.
John