The CCI Blazer boxes (red/black) I've purchased in the past with the dull gray aluminum cases specifically stated on the outside of the box not to reload. Bet your 38sp and 357 mag boxes saythe same thing. Two reasons - 1) not boxer primed, and 2) aluminum doesn't stretch like brass so will fail when resized and reloaded. Maybe not the first time, but it will fail much sooner than brass. If you bought this to collect the brass, make sure you buy the Blazer Brass (gold/black) type next time.