I really don’t want to hear the “I’ve never trimmed pistol brass” comments but I do have a question. After reading several topics about trimming .357 cases, quite a few people are talking about trimming after they resize and flare the cases. After resizing I understand but after flaring seems wrong. Wouldn’t that normally be done before flaring if it’s done at all? I can’t think of a good reason to flare first.

If I were to trim pistol brass, it would be after decapping and sizing the brass.

Never in 30+ years of reloading, but to answer the question, any trimming should be done after resizing and before flaring.

As posted above.

A while back I couldn’t find any 41 mag brass, but I could get brand new 414 mag Starline brass. It’s pretty much the same, about 1/4” longer.

I set up to trim back to regular 41 mag length, took a while, but worked fine. I left a few a little long, for snake-shot loads.

I am in the trim before flare camp. Flaring first could be inconsistent due to different case lengths. Then you would remove different amounts of flare based on case lengths before trim.

Resize, trim, and then neck size works well for me. As long as the cases get trimmed the same length, that's all that matters. I trim to 1.280" because the cannelure on one of the bullets I load will make the loaded cartridge longer than 1.590" if the brass is any longer than 1.280".