I keep everything so far. Some go into the library of cartridge cases for reference.
In 9x19 I really only load Blazer and Win because I had a lot of them. I keep a strategic stockpile of R-P brass, and just don’t find as much FC brass. I take the odd ones and sort some out to form Makarov brass. Mostly GFL and S&B since I load those in 9x18 already. I did find that some S&B cases are steel. Not many but some and trimming really makes them show. Now that I can find Starline Makarov brass the conversions are not as needed, but those things do toss some brass.
I figure I can keep the .40 and .380 I accidentally pick up and use them to trade for something else later.
In 9x19 I really only load Blazer and Win because I had a lot of them. I keep a strategic stockpile of R-P brass, and just don’t find as much FC brass. I take the odd ones and sort some out to form Makarov brass. Mostly GFL and S&B since I load those in 9x18 already. I did find that some S&B cases are steel. Not many but some and trimming really makes them show. Now that I can find Starline Makarov brass the conversions are not as needed, but those things do toss some brass.
I figure I can keep the .40 and .380 I accidentally pick up and use them to trade for something else later.