resizing question

[trickyasafox]

for those of you who reload pistol calibers in mass, do you ever need to trim these cases? it just occured to me that i never hear of trimming on straight walled cases, does it not happen? the only bottle neck cartrige ill be reloading for is 223, which from what people are sayin needs trimming almost every load.

what am i missing?

 

[Jim Watson]

The only pistol brass I have ever trimmed was a mixed lot of .357 magnums which I needed to be the same for an even roll crimp. I load mixed brass for 9mm and .45 ACP and it all taper crimps well enough.

Straight wall pistol cases seem not to stretch with reloading, some will even shorten as they expand in diameter.

 

[Black Snowman]

Lower pressure rounds, particularly straight walled, don't move much brass up the walls of the case to lengthen them. In fact in a straight wall case many high pressure rounds don't have much of a problem with this. I've never had to trim my .50 AE, 44 Mag, 357 Mag, or 45 ACP cases. Some low pressure rounds in autos, like 45 ACP, actually can get shorter from the battering they take when chambering. This can happen in light revolvers to with rounds that headspace on the case mouth.

Bottle neck rounds change shape a lot more on firing with the shoulder moving and brass stretching and flowing. Even pistol rounds need to be checked for brass length. That and lube are the reasons I avoid bottle necked pistol rounds.

But somehow I still ended up with a CZ 52. I was lucky though and given so much brass for it that it will be quite some time before I have to worry about trimming

 

[Mike Kerr]

trickasafox wrote:
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"for those of you who reload pistol calibers in mass, do you ever need to trim these cases? it just occured to me that i never hear of trimming on straight walled cases, does it not happen?"
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I reload large quantities of pistol calibers as a non commercial reloader.
In reloading over well over 100k rounds I have never had to trim pistol caliber cases. It just has not been necessary for my shooting applications.

There are some straight wall OR NEARLY straight wall cases that may need to be trimed from time to time but so far I have encountered this only in rifle calibers.

Regards,

 

[trickyasafox]

thanks very much guys!

one more trimming question, if im reloading for the 223, and its only gonna go in a single shot encore, is the trimming as vital? i say this because i've been buying loading manuels and slowly pieceing together a reloading setup, and am wondering at what priority the trimmer needs to be purchased

 

[taliv]

trimming would be pretty low. not as low as something like, say, neck turning, but pretty dang low relative to things like, more bullets, more bullets, and ....more bullets. oh, and especially low relative to stuff like quality calipers, scales and gauges.

 

[Black Snowman]

I'd check it, headspacing is important, if you have too much case length you won't be able to close the action on the round, which hurts accuracy Just measure it, if it's too long put it aside. Once they're all too long, trim them