1) For .38 Special revolvers, there is no need for 500-1000 rounds initially to find out if a gun works. If a S&W or Ruger works for 50 rounds, it will work, probably, until you go broke buying factory ammo.
2) Volume .38 shooters tend to reload because reloading it is so easy.
3) 2.7 grains, 3.0 grains, 3.5 grains of Bullseye with 125, 148, or 158 grain lead bullets reload so cheaply that shooting .38 is less than .22LR these days.
3a) DardasCastBullets: 6 cents http://www.dardascastbullets.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=dardas&Category_Code=38RNFP
3b) Primers on sale now: 2.5 cents, any smalll pistol
3c) Bullseye Pistol Powder: 2.0 cents when you get 1000 rounds at least out of a pound with these .38 loads
3d) Brass: the round just fired saves your brass
4) 10.5 cents, $5.25 per box of 50, why buy cheapo factory.