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 11-06-2010, 01:05   #1
RedHaze
Handgunner
 
RedHaze's Avatar
 
Join Date: Aug 2009
Location: SE WA
Posts: 2,386
Overpressure

Working with 357 sig specifically. With a 125 gr hornady HAP bullet, and the HS-6 I have on hand for now. Started out at max minus 10% and worked up to max without issue. Which Lyman has at 9.0 gr. However, the 357 sig loadbook I have lists max at 9.3 gr for the 125's. So I made me a couple at 9.1 gr and 9.2 gr... Here's what I have to show for it.

Brass case is mine at 9.2 gr.
Nickel case is Fiocchi Extrema, which feels a bit hotter than my reloads.

Anybody see anything here that should be raising an eyebrow? To my poorly trained eyes they all look fine and dandy... But thats me, and I haven't been in the reloading scene long.

Thanks fellas.
Attached Thumbnails
Reloading - Click for larger version  
__________________
I MAY DIE IN A DITCH, BUT I'LL BE LYING IN A BED A BRASS
*SHEEPLE: SHEEP LIKE PEOPLE, MANY OF WHOM DENY THE EXISTENCE OF WOLVES, AND VOTE TO PULL THE TEETH OF THE SHEEPDOGS WHO PROTECT THE FLOCK
RedHaze is offline   Reply With Quote
Old 11-06-2010, 05:59   #2
MSgt Dotson
Senior Member
 
Join Date: Sep 2006
Posts: 4,226
If running mixed brass, I'd observe the lower of the two max charges given; many manuals that give higher charges use a very specific brass, bullet, and primer. If using 'fired several times' brass, I'd stay away from max charges, and, once the brass has been used 6-8 times, toss it entirely.
MSgt Dotson is offline   Reply With Quote
Old 11-06-2010, 06:03   #3
dudel
Senior Member
 
dudel's Avatar
 
Join Date: Dec 2008
Location: North Georgia Mountains
Posts: 4,389
Hard to tell from the pics. What speed did they cross the screens at? That will give you the best indication of pressure (short of a KB of course!).
dudel is offline   Reply With Quote
Old 11-06-2010, 10:15   #4
RedHaze
Handgunner
 
RedHaze's Avatar
 
Join Date: Aug 2009
Location: SE WA
Posts: 2,386
I've no chrono unfortunatly. Thats on the wish list, just like a lot of other things...

Brass is new starline. I certainly wouldn't use mixed brass to try out max loads. I may be foolish but i'm not dumb...
__________________
I MAY DIE IN A DITCH, BUT I'LL BE LYING IN A BED A BRASS
*SHEEPLE: SHEEP LIKE PEOPLE, MANY OF WHOM DENY THE EXISTENCE OF WOLVES, AND VOTE TO PULL THE TEETH OF THE SHEEPDOGS WHO PROTECT THE FLOCK
RedHaze is offline   Reply With Quote
Old 11-06-2010, 11:33   #5
WiskyT
Malcontent
 
WiskyT's Avatar
 
Join Date: Jun 2002
Location: North Carolina
Posts: 11,764
9.0 or 9.3, the powder varies that much form lot to lot. 9.0 with one lot could be higher pressure than 9.3 with the next.
__________________
Drugs are bad because if you do drugs you're a hippie and hippies suck.
Eric Cartman


"If you kill enough of them, they stop fighting."-General Curtis E. LeMay
WiskyT is offline   Reply With Quote
Old 11-06-2010, 11:36   #6
RedHaze
Handgunner
 
RedHaze's Avatar
 
Join Date: Aug 2009
Location: SE WA
Posts: 2,386
Interesting, i'll be sure to work 'em up with each new batch of powder then.
__________________
I MAY DIE IN A DITCH, BUT I'LL BE LYING IN A BED A BRASS
*SHEEPLE: SHEEP LIKE PEOPLE, MANY OF WHOM DENY THE EXISTENCE OF WOLVES, AND VOTE TO PULL THE TEETH OF THE SHEEPDOGS WHO PROTECT THE FLOCK
RedHaze is offline   Reply With Quote
Old 11-06-2010, 16:50   #7
Damon555
Senior Member
 
Damon555's Avatar
 
Join Date: Mar 2009
Location: Middle Tennessee
Posts: 165
I'd stay away from max by .5 grain or so....as long as the gun functions properly then there is no need to max it out....IMHO.

The brass in your picture looks fine. The primers aren't close to being flat.....but that's not the only over pressure indication you might get. Those .357 sigs run pretty hot anyway.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Damon555 is offline   Reply With Quote
Old 11-06-2010, 18:01   #8
RedHaze
Handgunner
 
RedHaze's Avatar
 
Join Date: Aug 2009
Location: SE WA
Posts: 2,386
Yeah, I figured on staying at about the halfway point in the data between the different sources.

To give myself a little discrepancy room with the variables...
__________________
I MAY DIE IN A DITCH, BUT I'LL BE LYING IN A BED A BRASS
*SHEEPLE: SHEEP LIKE PEOPLE, MANY OF WHOM DENY THE EXISTENCE OF WOLVES, AND VOTE TO PULL THE TEETH OF THE SHEEPDOGS WHO PROTECT THE FLOCK
RedHaze is offline   Reply With Quote
Old 11-06-2010, 18:13   #9
dudel
Senior Member
 
dudel's Avatar
 
Join Date: Dec 2008
Location: North Georgia Mountains
Posts: 4,389
Quote:
Originally Posted by RedHaze View Post
Interesting, i'll be sure to work 'em up with each new batch of powder then.
Good idea. That's why when you find a powder that works well, you get an 8# keg and do a final workup.
dudel is offline   Reply With Quote
Old 11-06-2010, 19:13   #10
Kegs
Ol 8 fingers ;)
 
Kegs's Avatar
 
Join Date: Oct 2009
Location: Cold side of conus
Posts: 2,682
The truth is primer flattening is not necessarily a sign of pressure, and overpressure loads won't necessarily show any signs of pressure at all.

Only way to assess pressure is via a test barrel and related equipment.

That being said, the brass and primers looks like they are from wimpy loads.

I wouldn't be concerned.
__________________
"What's the down side to 10mm again? Oh, that's right, there isn't one."" Carrier21
Kegs is offline   Reply With Quote
Old 11-06-2010, 23:10   #11
fredj338
Senior Member
 
fredj338's Avatar
 
Join Date: Dec 2004
Location: so.cal.
Posts: 21,796
Blog Entries: 3
Quote:
Originally Posted by Kegs View Post
The truth is primer flattening is not necessarily a sign of pressure, and overpressure loads won't necessarily show any signs of pressure at all.

Only way to assess pressure is via a test barrel and related equipment.

That being said, the brass and primers looks like they are from wimpy loads.

I wouldn't be concerned.
I've never seen an "overpressure" load show no pressure signs at all. There is always something to see, but flattened primers is nto a sure indicator. Max varies o much w/ diff published data sources. In the current Speer, you are good to go upto 9.6gr w/ the GDHP or TMJ. The Hogdon site syas 9gr for the XTP. IME, the XTp is a bit "harder" w/ longer bearing surface & can raise pressure a bit. Siff test platforms, conditionins, components, you have to do what you are doing & work them up. If it work sin your gun, that is your max. The rule of "never exceed max" depnds on whos max. Match the components as closely as possibel & go slow. Form those pics I don't see anything that makes me say back off.
__________________
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".

Last edited by fredj338; 11-06-2010 at 23:11..
fredj338 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 23:16.




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


Users Currently Online: 937
217 Members
720 Guests

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