Pistol brass need trimming?

[Davemac]

Getting started in pistol reloading mostly will be 9mm , I've heard that pistol brass usually doesn't need trimming? Unless just trimming to uniform different brands head stamps? Thanks

[boombotz401]

Never trimmed a pistol case

Just rifle

If your loading bottleneck like 357 Sig maybe but not straightwall


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[Eurodriver]

Never trimmed a pistol case

Just rifle

[markm]

There's a spec naturally. But hell no.

[gunnerblue]

Trimming brass to be used for revolver rounds can be beneficial, especially those with heavy recoil, as it helps to ensure the crimp is applied evenly around the crimp groove and at the proper location. For semi auto use such as 9mm, though, I wouldn't worry about it.

[sinister]

http://www.massreloading.com/loading45ACP.html

[andre3k]

I've done it only a few times for revolver brass that's used for my hotter loads. It ensures a consistent roll crimp.

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[MegademiC]

For typical use, no. If in was trying to win a bullseye competition, maybe, but probably not even then.

[anachronism]

Or perhaps long-range revolver work. I recycle any piece of handgun brass that fails to please me, or requires any special handling, like trimming.

[Davemac]

Thanks guys for the great info.

[kerplode]

I really only trim magnum revolver brass so I can get a consistent roll crimp.

[jack crab]

No, in part, because life is too short.

[Bret]

Back before the internet I had to teach myself how to reload because I didn't know anyone who reloads. So, I bought several reloading manuals and read them all before I got started. They all discussed trimming brass to the trim to length if one case in the lot exceeded the maximum length, so I went to town trimming all of my 40S&W brass (first pistol cartridge I reloaded). Imagine my surprise after shooting when I noticed that all of my cases were getting shorter. I looked back through my manuals. Nope, not one of them said that straight walled cases get shorter and bottle necked cartridges get long. I learned a valuable lesson; the manuals leave out very important details.