When I first tried CAS, I wasn't setup to reload .38. I bought 1000 rounds of ammo from Georgia-Arms. Didn't have a single issue with their ammo. I kept all the brass and then used it when I was tooled up to reload .38. This may be the simple way to start, it was for me.
PS. I just checked their website again, 1000 rounds (Canned Heat) is only $250.00.
I just looked at some price tags on my bench, I will let you do the math.
1 LB bottle of Bullseye - 25.99 (7,000 grn / pound) so depending on your load....
1 Box 1000 Federal SP Primers - 35.99
500 Once Fired .38 brass from gunbroker - 45.00
500 Precision Bullets - Molly coated - 39.00
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