Trimming 9mm?

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Clear Black

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Very new to reloading here, so much so I have never done it before, just in the research phase. Im sorta compiling a list of questions as I go, but this one particular is been on my mind lately. I kinda familiar with the trimming rifle brass procedures by watching videaos via youtube, but for the life of me I am falling short on finding info/videos on trimming 9mm brass.

So I guess I need to ask you guys what do you use for trimming 9mm brass, whats the process(ie, do you trim EVERY piece) and where can I get some info or a video on 9mm brass trimming.

Im not the best on knowledge of ammunition, but I think I am referring to the basic straight walled 9mm brass. I have not ever seen a 9mm cartridge with anything other than a straight wall. So thats where I am at so far. Any info on the subject please feel free to chime in.
 
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Life is too short to trim pistol brass.

Trimming 9mm brass would seem necessary, as the cartridge headspaces on the case mouth. Consistent length would also lead to a more consistent crimp. However, you will find many/most handloaders, including myself, do not trim 9mm pistol brass, or any straight wall pistol cases. Pistol brass actually tends to shrink, not grow longer as you see with rifle brass. I have never trimmed a single 9mm case and thousands of rounds of 9mm have left my loading bench in spec and functioned perfectly.

* A small note as someone will undoubtedly bring it up. The 9mm case does have a slight taper to it. In this sense it is not technically a straight wall case, but is treated as such for all intents and purposes.
 
I have never found it necessary to trim any pistol or revolver brass, and I don't know anyone who does. That includes .38 special, .357 magnum, 9mm Luger, and .45 ACP, all of which I have reloaded thousands of rounds. The brass does not seem to stretch and flow as does most rifle brass.
 
Yep, that was the correct answer. 9mm brass tends to get shorter over time as its reloaded. You can trim it if you want, but about the only end would be to get uniform bullet seating. Might be more time effective to just sort the stuff you've got by length, then reload it in batches by case length.

It might also depend on the kind of shooter you are. If you buy once fired, or God knows how many times fired, sorting or trimming might be for you.

But if you buy your ammo new and generate your own once fired brass, you can be pretty darn sure its the same length if you keep it together.

I've lowered myself to the bottom of the barrel and purchased gun show bags or 1000 empties. It was for a reloading project back about 1994. I'm a skeptic, and the stuff I paid a premium for that was labeled as once fired may or may not have been. It did look nicer. I didn't bother to check lengths or trim it. I used a single stage press to load it. You can see or feel a difference in length if you concentrate. I couldn't tell.

And it shoots just fine...still. My youngest son hit the stash pretty hard a couple of years ago. He never complained about it (and your own sons would complain even about free ammo.)

So my take on it is you've hit upon a non-issue. You can pursue it as much as you want, it will burn valuable time.
 
Thanks all for your great info. Like I said in my original post, I am very new to reloading, so much so that I havnt even done it and am researching it as I go. I was at a loss for info and regards to if you actually did trim 9mm brass. It wasnt a case of me actually wanting to do it, I was REALLY hoping that the lack of info was because you DIDNT have to trim. It seems my prayers have been answered.

Thanks all for the tips.
 
I've never trimmed a service [istol case, never. I do trim magnum revolver cases now & then to keep the roll crimp uniform. If you never shoot near max loads, they probably never need trimming either.
 
In general I do not feel the need to trim 9mm or 45acp brass, with one exception.

The Ruger Blackhawk convertable models I own seem to have the headspace shoulder cut to minimum specs, so the cases need to be trimmed to minimum specs to prevent cylinder binding.

bishawk_r.jpg
 
I have trimmed .38 brass, when used in a Mod 52 S&W to get absolutely the the most consistent crimp and accuracy. And, that's about the only pistol brass I have ever trimmed.
 
You guys are no fun!. He said he was new. Should have said yes you must trim every piece of brass to exact specs.:D:rolleyes:

Only kidding Clear Black. Welcome to the loony bin:)

Never trimmed any pistol/revolver brass. The only new brass I ever bought was some 45 Colt as there was no used stuff to be found. I set up the trimmer and found I was wasting my time.

I did ream and chamfer them though. Probably a waste also.
 
Rule3 said:
You guys are no fun!. He said he was new. Should have said yes you must trim every piece of brass to exact specs.:D:rolleyes:

Only kidding Clear Black. Welcome to the loony bin:)

Never trimmed any pistol/revolver brass. The only new brass I ever bought was some 45 Colt as there was no used stuff to be found. I set up the trimmer and found I was wasting my time.

I did ream and chamfer them though. Probably a waste also.
Click to expand...

HA! That would have been funny :)

OK, part 2 of newbie lessons. What exactly is the process of case prep for a standard 9mm brass cartridge? By standard I mean nothing fancy will be done with the ammo I shoot. I basically buy the cheapest ammo on sale, and consistantly shoot from 10-15yrds, no further. Its only paper targets I shoot, no competition loads needed, just plinkers.

My question basically is, what do I do after I tumble my 9mm brass to get them ready to reload. I was looking at this machine here:

Cabela's: Lyman Case-Prep Xpress

Are these tools used to prep 9mm brass, or is this machine typically used for rifle brass prep? Basically what Im looking for is a retards book for a step x step process on 9mm case prep. For example,

Step 1: Find your brass ;)
Step 2: Clean, tumble the brass
Step 3:
Step 4:
Step 5: At this point my brass will be ready to go thru the reload press and become a 9mm round.

So in a nutshell, what am i missing between steps 2-5. :confused:

Im really not very versed in the reloading vocab yet, so truly sorry if most of you are now shaking your heads saying *** is this guy talking about :cool:
 
Case Trimming

fredj338 said:
I've never trimmed a service [istol case, never. I do trim magnum revolver cases now & then to keep the roll crimp uniform. If you never shoot near max loads, they probably never need trimming either.
Click to expand...

I'm with Fred on this one...

I'd rather have my toe hairs pulled out one at a time with a dirty Leatherman by a 300 pound liberal she-bear than trim autopistol brass.

I only trim revolver rounds and then, only in the magnum chamberings to keep the mouth case square and the roll crimp pressure consistent.

In so doing, I have of late changed over from a rotary trimmer to trim dies. I find that using this method is not nearly as odious.

But by far the best ways to eliminate the need for trimming brass is to keep lots together by brand and numbers of usages. Replace with frequency, buy in larger lots and only buy brass that has no channelure as this promotes rapid, inconsistent case length changes as the channelure 'irons out'.

Drew
 
Clear Black said:
HA! That would have been funny :)

OK, part 2 of newbie lessons. What exactly is the process of case prep for a standard 9mm brass cartridge? By standard I mean nothing fancy will be done with the ammo I shoot. I basically buy the cheapest ammo on sale, and consistantly shoot from 10-15yrds, no further. Its only paper targets I shoot, no competition loads needed, just plinkers.

My question basically is, what do I do after I tumble my 9mm brass to get them ready to reload. I was looking at this machine here:

Cabela's: Lyman Case-Prep Xpress

Are these tools used to prep 9mm brass, or is this machine typically used for rifle brass prep? Basically what Im looking for is a retards book for a step x step process on 9mm case prep. For example,

Step 1: Find your brass ;)
Step 2: Clean, tumble the brass
Step 3:
Step 4:
Step 5: At this point my brass will be ready to go thru the reload press and become a 9mm round.

So in a nutshell, what am i missing between steps 2-5. :confused:

Im really not very versed in the reloading vocab yet, so truly sorry if most of you are now shaking your heads saying *** is this guy talking about :cool:
Click to expand...

You are right, that machine os more for bottle neck rifle brass. You really only need to clean handgun brass in some way & then reload. Inspect the cases prior to reloading to make sure there are no cracked brass or if range pickups, no Berdan primed or crimped primers or obviously abused handloads (Glock guppy brass). It's really not more complicated than that.
 
Clear Black,

You do not need that machine for handgun brass.

Technically you do not even need to clean your brass but most will agree it is a good thing to do. Looks better and keeps your equipment and hands clean.

You can wash it in an old bucket with soap and water, rinse very well and let it sit out until dry.

Even better get a tumbler and media.

BUT: Get some manuals first.

If you go to the RCBS web site there are videos and step by step instructions. Request a catalog and you get some basic reloading steps.

But: Get some manuals.:)

RCBS - Precisioneered Shooting Products - Guide to Reloading
 
Clear Black said:
Basically what Im looking for is a retards book for a step x step process on 9mm case prep.
Click to expand...

Tumble the brass and size it, which will pop out the old primer at the same time. Expand. Prime. Charge with powder. Seat the bullet and crimp.

That's it.

Have you read The ABCs of Reloading 9th Edition? If not, I highly recommend you do. It will answer a lot of your questions about all aspects of handloading.

Amazon.com: The ABCs Of Reloading: The Definitive Guide for Novice to Expert (9781440213960): Rodney James: Books
 
I second that on the ABCs of Reloading. It answered a lot of my questions, and brought up some new ones. I am also new to reloading. Just gathering my info and equipment. I am actually getting ready to build a relaoding area in the basement.

Bob

Dragon88 said:
Have you read The ABCs of Reloading 9th Edition? If not, I highly recommend you do. It will answer a lot of your questions about all aspects of handloading.
Click to expand...
 
Get the above manual and another one like Speer, Lyman or Hornady.

Read through them all before you start buying stuff.

Reloading is not Rocket Science (well in a way it is) but it is not something to take short cuts, find the easy way out and just go and do it.
If you do not have someone to show you, you need to study, read, ask questions before you buy stuff or load your first round.

Buy the Manuals, did I mention that?:)
 
Sorry I'm late to this thread. I personally see no need to trim handgun brass and I never do. You can spend your time doing it but I truly feel it's time wasted. Good reasons not to are listed above.
 
If you are not using carbide dies don't forget the case lube step of the reloading process. May sound obvious but you said you were new.

BTW, The only time I trim 9x19 brass is when I'm converting it into 9x18 brass.
 
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