Do you all trim 9mm brass?


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Matt Dillon
January 30, 2013, 10:44 PM
I have a bunch of 9mm to process, and I dread the thought of trimming all of it. 9 mm is a relatively new caliber to me,and I always trim my straight walled cases, such as 38 and 357 magnum, because I roll crimp them. But I plan to use a Lee factory crimp die to give them a taper crimp. Thanks in advance for your help!

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soloban
January 30, 2013, 10:47 PM
I don't trim handgun cases.

flipajig
January 30, 2013, 10:49 PM
No I don't. Check for obvious damage sort out the non loadable tumble and load no trimming for me.

Jenrick
January 30, 2013, 10:57 PM
With soloban, I don't trim any of my handgun cartridges.

-Jenrick

jcwit
January 30, 2013, 10:57 PM
In a word, NOPE!

MutinousDoug
January 30, 2013, 11:11 PM
I don't shoot 9mm much but throw away all my .45ACP brass when it gets shortened to .885" OAL.
By that time, I can't hardly read the headstamp anymore.

beatledog7
January 30, 2013, 11:23 PM
Never have trimmed 9mm. Have trimmed a few .357 Mag.

45lcshooter
January 30, 2013, 11:35 PM
I just make sure its within the specs. Straight walled cased do not tend to grow. Sometimes but very seldom.

icanthitabarn
January 30, 2013, 11:44 PM
What a break I have from not trimming 9, especially since I have Lee, hand trimmed, everything else, and quite a bit of it. It still is sorted by stamp thou.

italy176
January 30, 2013, 11:47 PM
Yes, I do trim my 9mm Luger brass - only if it needs it. I use a Lyman E-Zee case gauge ( http://www.lymanproducts.com/lyman/case-prep/ezee-case-gauge.php ). It is cheap and quick to use. You can quickly sort hundreds of pieces of brass in no time.

If you load to max your brass will eventually need to be trimmed.

jmorris
January 30, 2013, 11:50 PM
Loaded hundreds of thousands, never trimmed one.

Walkalong
January 31, 2013, 12:17 AM
No.

Just adjust the taper crimp die to completely remove the bell on the shortest cases, and that will still be OK on the longest ones.

CGT80
January 31, 2013, 01:21 AM
I have loaded tens of thousands of pistol brass. The only ones that have grown are my 460 S&W mag cases. After 5+ uses, they were inconsistent and did not line up well with the canelure of the bullets.

I run 9mm through a dillon 1050 with a bullet feeder, by the thousands. As long as I don't get 380 or 38 super mixed in, it is all good. Headstamp doesn't matter. My 9mm is used for local competitions, and performs just fine.

Arkansas Paul
January 31, 2013, 01:26 AM
We load for .45 Colt, .40, .38 spcl, and .357 SIG. I have never trimmed a piece of handgun brass, even the ones I roll crimp. Never have had any issues either.

Hondo 60
January 31, 2013, 01:59 AM
Never - I haven't trimmed any handgun brass in eons.
I tried to trim when I first started, cuz that's what the book said to do.

But I found that 99.9% of the brass is at or very near the "trim to" length already.

gamestalker
January 31, 2013, 02:01 AM
Most reloaders I nwo don't trim rimless brass. However, I'm not one of those and have been maintaining all brass to within SAAMI spec., regardless of type. When I started relaoding several decades ago I read and followed the books to the letter and have been doing it this way ever since.

My take on why I feel it is necessary to trim 9mm in particular is because,
A. it head space on the mouth,
B. if I were to apply a crimp to remove the belling I would want all the cases to have the same degree of taper crimp, and this is a head space related reason.
There are several head space issues that can result if 9mm or other rimless cartridges aren't kept to within SAAMI spec.. I hear a lot of reloaders say that straight walled cases don't stretch beyond SAAMI spec., but in my experience i commonly see once and twice fired brass exceeding the allowable maximum as defined by SAAMI. In this regard I can honestly say that I have yet to experience a single mis-fire or other failure with any cartridge I've reloaded.

GS

kerreckt
January 31, 2013, 02:09 AM
I have been reloading since 1982 and have never trimmed a case for a handgun round.

ReloaderFred
January 31, 2013, 02:15 AM
I've been reloading since 1963 and have only trimmed 5 Federal 357 Sig cases, just because I wanted to. My round count is well over 750,000+ rounds, and those five cases are the only handgun rounds I've ever trimmed, or ever will.

Life is too short to spend it trimming pistol brass.......

Hope this helps.

Fred

jwrowland77
January 31, 2013, 06:42 AM
Yep sure do.

evan price
January 31, 2013, 07:11 AM
Don't trim, don't sort, don't separate 9mm. Its all the same more or less. It works or it doesn't. Wow, could you imagine the time spent measuring and trimming 10,000 9mm cases....yeesh.

tightgroup tiger
January 31, 2013, 07:21 AM
Yes, I keep my cases within saami specs also. If you mic your shells before you check length on your cases you will find you don't have very many you'll have to trim.

If you check your cases with a dial caliper and pull out all cases over .750, you'll find you don't have very many to trim. It's not what it sounds like.

Ky Larry
January 31, 2013, 07:49 AM
I don't trim 9mm brass. All my 9mm reloads are just for blasting ammo. If I am carrying a 9mm for possible social work, I keep it loaded with 124gr Federal HydraShocks. I have so much 9mm brass I sometimes don't even bother to pick it up.

wtr100
January 31, 2013, 08:06 AM
only nickle cases and then because I'm converting them to 9x18 Makarov

:p

cfullgraf
January 31, 2013, 08:27 AM
I do not trim 9x19, never have.

When I first got into reloading in the early eighties, I trimmed some 357 Magnum cases in an attempt to make roll crimps more uniform. An exercise in futility but i still have a few boxes of new, never used, 1980 vintage, trimmed 357 Magnum cases. They are too valuable with too much time invested in them to use them.:)

I do trim 38/45 Clerke when forming them from 45 ACP case, but that is different. Once formed, they never see the trim die again.

rbernie
January 31, 2013, 08:33 AM
Nope.

Walkalong
January 31, 2013, 08:36 AM
I do trim mixed revolver brass for more uniform crimps. I do not trim it if I buy a big batch of one brand which is very uniform in length.

emb
January 31, 2013, 09:02 AM
If you do, you'll only do it once! It is not worth the effort for target loads and makes no difference at all in how it performs.

Trent
January 31, 2013, 09:05 AM
Nope. I've never had to trim 9mm, 45, or any other straight walled case.

I've actually measured it getting SHORTER over generations of loading. Not longer.

Trent
January 31, 2013, 09:07 AM
I do trim mixed revolver brass for more uniform crimps.

THAT is not a bad idea. :)

I just started getting in to revolvers, previously only loaded for autos. But what you said makes a heck of a lot of sense for magnums.

SSN Vet
January 31, 2013, 11:41 AM
another 'no' response here.

ranger335v
January 31, 2013, 12:00 PM
I only trim rimless handgun cases if they're too long and that's rare; reason is that they headspace off the case mouth so making them shorter doesn't do anything good.

The 9mm really doesn't need "crimping" anyway, all you need to do is remove any flare you may have done and return the mouth to original diameter so it will feed, chamber and lock easily.

Steve in PA
January 31, 2013, 05:08 PM
Been reloading for over 22 years, never trimmed a piece of handgun brass in all those years.

SlamFire1
January 31, 2013, 05:18 PM
Nope. Don't trim pistol brass.

Trimmed 44 Magnum brass to use in a M1894 Marlin rifle. Did not make any difference there either.

rikman
January 31, 2013, 07:08 PM
I've been reloading since 1963 and have only trimmed 5 Federal 357 Sig cases, just because I wanted to. My round count is well over 750,000+ rounds, and those five cases are the only handgun rounds I've ever trimmed, or ever will.

Life is too short to spend it trimming pistol brass.......

Hope this helps.

Fred
Sage advice Fred lol

mljdeckard
January 31, 2013, 09:46 PM
I'm still a rookie, and I don't know which rules I can bend, so I'm pretty cautious. I sample check cases for length, but I have not yet needed to trim any 9mm or .45 cases. Based on what I have read here, I doubt I will. If I get an odd occasional one that has stretched, I will probably just chuck it.

Trent
February 1, 2013, 09:00 AM
You'll split the necks from work-hardened brass way before you ever need to think about trimming them.

Although I don't track pistol brass by generation, I've got some 45's that are sitting at 15x by now, I'm sure. Every once in awhile I'll have a bullet split the case neck. I pull the bullet with my fingers, pour the powder in the hopper, toss the round in a 45 and pop the primer. Then chuck the ruined brass in the recycle bin. Doesn't happen very often, and I've got some old WWII surplus that's been run through the autos so much the rim is nearly ruined from extraction. :)

ReloaderFred
February 1, 2013, 11:14 AM
As plentiful as 9x19 brass is, there's no need to even consider trimming it. I'm looking at buckets full of it in my garage, and the thought of trimming any of my handgun brass gives me the shivers. I'd rather spend the time loading and shooting.....

Hope this helps.

Fred

floydster
February 1, 2013, 01:27 PM
Me no trim pistol brass eder.

Smokeyloads

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