Home Forums Classifieds Blogs Today's Posts Search Social Groups



  
SIGN-UP
Notices

Glock Talk
Welcome To The Glock Talk Forums.

 
  
Reply
 
Thread Tools Display Modes
Old 07-09-2014, 20:17   #1
dannyyates
Member
 
Join Date: Mar 2013
Location: Altamont Tn,
Posts: 99
brass length never the same

I have used rem, win, fed, and few others. They are never the same length. And never the. 992". I have been using starline 10mm mags. That was all i could get back few monts ago when everthing was backordered. Can someone tell me the lenght on the 10mm auto starline. I need to order some new brass if there not 992". I will just trim the mags. I also need a new digital cailper. Any info on dillon or rcbs.
dannyyates is offline   Reply With Quote
Old 07-09-2014, 20:25   #2
Taterhead
Counting Beans
 
Join Date: Dec 2008
Location: Boise, Idaho
Posts: 2,958
Probably not the answer that you're looking for, but I don't find any benefit in uniform case length in a service cartridge. As long as they are less than max length, then good to go. It is true that there is an effect on crimp with different case lengths but not enough to make any practical difference. I do pay attention to length for rifle cartridges though.

I especially do not trim service cartridge brass since it tends to shrink in length over time. Starline is typically about .990" when new, and it will gradually shorten with repeated cycles of firing and re-sizing.

I like dial calipers. It seems like the same company makes a lot of them, and they are branded by RCBS, Cabelas, Lyman, Harbor Freight, etc. They are all identical save for the brand. The HF one is only about $13 so that is what I'd do if I needed one.
Taterhead is offline   Reply With Quote
Old 07-09-2014, 20:56   #3
WeeWilly
Senior Member
 
Join Date: Nov 2011
Location: PRK
Posts: 1,601
I grabbed 6 new Starline cases out of the bag and measured them all. They all were .987"

I grabbed a few that have had a few turns on them, after being sent through the G-Rx and then sized in my Dillon sizer, measured .989" If you don't pass through size them, as Tater noted, they shorten up as you reload them.

My last Digital Caliper I bought from Graf and Sons, I think it was their generic offering, like $35, works great. I used it to measure the new Starline cases.
__________________
Audentes fortuna iuvat
WeeWilly is offline   Reply With Quote
Old 07-10-2014, 17:16   #4
nickE10mm
F.S.F.O.S.
 
nickE10mm's Avatar
 
Join Date: Apr 2004
Location: Wichita, KS
Posts: 4,316
Send a message via AIM to nickE10mm Send a message via MSN to nickE10mm Send a message via Yahoo to nickE10mm
I have found the same to be true ... I have a LOT of mixed target brass and its all over the place as far as case length. I don't worry about it too much. Its annoying with my .44 mag stuff because it affects where I crimp, and since I roll crimp my .44 stuff it makes some cartridges look funny when the case length is different but for 10mm (auto cartridges) I don't worry TOO much about it.

I THINK that .998" is the official length but I could be wrong. Any handloaders manual will tell you for sure. I don't have one handy.
__________________
10 Ring #1033 - Longslide #1045 - 10mm Loader #1066

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

Why do I carry a 10mm?
“Because a 9mm only kills your body… the 10mm kills your soul.”
nickE10mm is offline   Reply With Quote
Old 07-10-2014, 21:27   #5
TDC20
Senior Member
 
TDC20's Avatar
 
Join Date: Apr 2011
Posts: 610
I agree with Taterhead and Nick. The 10mm was designed to headspace on the brass length in the chamber, but it won't matter if it's .020' short. Maybe as you approach .040 - .050" you could start seeing problems, but consider that a lot of people shoot 40S&W from their Glock 10's, where the extractor holds the case in place for firing, not the brass headspacing on the chamber as the autoloaders are designed to. If you have a Glock 10, you could theoretically reload any shorter length brass and still be OK.

Not sure how really short brass affects cycling reliability, since I'm not one of those who shoots 40S&W from my 10mm barrels. Maybe someone else with experience with it will post.

0.992" is SAAMI max. case length. Sierra's reloading manual lists their trim-to length at 0.987", but you don't have to trim them any shorter than 0.992"
__________________
A handgun is only good for fighting your way to a rifle.

Last edited by TDC20; 07-10-2014 at 21:31..
TDC20 is offline   Reply With Quote
Old 07-10-2014, 21:39   #6
WeeWilly
Senior Member
 
Join Date: Nov 2011
Location: PRK
Posts: 1,601
Short won't be a problem, I use 40SW brass all the time in my 10mm target loads. Too long and you will know right away as the gun won't go into battery.
__________________
Audentes fortuna iuvat
WeeWilly is offline   Reply With Quote

 
  
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




All times are GMT -6. The time now is 18:00.




Homepage
FAQ
Forums
Calendar
Advertise
Gallery
GT Wiki
GT Blogs
Social Groups
Classifieds


Users Currently Online: 1,151
332 Members
819 Guests

Most users ever online: 2,672
Aug 11, 2014 at 2:31