HuntingNut
HuntingNut
   Login or Register
HomeCommunity ForumsPhoto AlbumsRegister
     
 

User Info

Welcome Anonymous


Membership:
Latest: RichardZ
New Today: 0
New Yesterday: 0
Overall: 13126

People Online:
Members: 0
Visitors: 214
BOT: 1
Total: 215
Who Is Where:
 Visitors:
01: Your Account
02: Forums
03: Forums
04: Forums
05: Home
06: Photo Albums
07: Forums
08: Statistics
09: Forums
10: Forums
11: Forums
12: Forums
13: Forums
14: Forums
15: Home
16: Forums
17: Photo Albums
18: Forums
19: Home
20: Photo Albums
21: Forums
22: Forums
23: Forums
24: Home
25: Your Account
26: Home
27: Forums
28: Photo Albums
29: Forums
30: Forums
31: Forums
32: Forums
33: Photo Albums
34: Forums
35: Your Account
36: Forums
37: Home
38: Forums
39: Forums
40: Forums
41: Forums
42: Forums
43: Forums
44: Forums
45: Forums
46: Photo Albums
47: Home
48: Forums
49: Forums
50: Forums
51: Forums
52: Home
53: Forums
54: Your Account
55: Forums
56: Forums
57: Forums
58: Forums
59: Forums
60: Forums
61: Home
62: Photo Albums
63: Photo Albums
64: Home
65: Home
66: Forums
67: Forums
68: Photo Albums
69: Forums
70: Photo Albums
71: Forums
72: Forums
73: Forums
74: Photo Albums
75: Forums
76: Forums
77: Home
78: Your Account
79: Forums
80: Forums
81: Forums
82: Forums
83: Forums
84: Home
85: Forums
86: Your Account
87: Home
88: Forums
89: Photo Albums
90: Forums
91: Your Account
92: Forums
93: Your Account
94: Home
95: Forums
96: Forums
97: Forums
98: Home
99: Your Account
100: Forums
101: Forums
102: Forums
103: News
104: Forums
105: Forums
106: Your Account
107: Forums
108: Forums
109: Home
110: Your Account
111: Forums
112: Forums
113: Forums
114: Home
115: Home
116: Photo Albums
117: Home
118: Forums
119: Forums
120: Forums
121: Forums
122: Forums
123: Forums
124: Home
125: Forums
126: Home
127: Forums
128: Forums
129: Home
130: Home
131: Forums
132: Forums
133: Forums
134: Forums
135: Forums
136: Forums
137: Home
138: Forums
139: Forums
140: Forums
141: Forums
142: Forums
143: Forums
144: Forums
145: Forums
146: Forums
147: Photo Albums
148: Forums
149: Forums
150: Forums
151: Home
152: Your Account
153: Forums
154: Photo Albums
155: Forums
156: Forums
157: Forums
158: Forums
159: Your Account
160: Forums
161: Forums
162: Your Account
163: Home
164: Forums
165: Home
166: Photo Albums
167: Forums
168: Forums
169: Forums
170: Forums
171: Forums
172: Your Account
173: Forums
174: Home
175: Forums
176: Home
177: Photo Albums
178: Forums
179: Forums
180: Forums
181: News
182: Home
183: Home
184: Forums
185: Forums
186: Photo Albums
187: Forums
188: Forums
189: Your Account
190: Forums
191: Forums
192: Forums
193: Forums
194: Forums
195: Forums
196: Forums
197: Forums
198: Forums
199: Forums
200: Home
201: Forums
202: Forums
203: Forums
204: Forums
205: Forums
206: Forums
207: Forums
208: Forums
209: Forums
210: Your Account
211: Forums
212: Forums
213: Photo Albums
214: Photo Albums
  BOT:
01: Photo Albums

Staff Online:

No staff members are online!
 

Coppermine Stats
Photo Albums
 Albums: 308
 Pictures: 2451
  · Views: 820725
  · Votes: 1316
  · Comments: 86
 

Help reading primers for pressure
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
Go to page Previous  1, 2, 3, 4, 5, 6, 7, 8, 9  Next
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition

View previous topic :: View next topic  
Author Message
Bushmaster
Super Member
Super Member


Joined: Jun 12, 2005
Posts: 11390
Location: Ava, Missouri

PostPosted: Tue Sep 07, 2010 10:21 am    Post subject: Re: Help reading primers for pressure Reply with quote

Anyone pay much attention to cartridges fired in Glock 9mm and .40 S&W?

If primers were an indication of over pressure. Those would sure worry me.

_________________
I have one nerve left and yer standin' on it...

DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
LIBERTY A well armed sheep contesting the outcome of the vote...
Back to top
View user's profile
stovepipe
Super Member
Super Member


Joined: Sep 25, 2008
Posts: 4877
Location: Pine, Az.

PostPosted: Tue Sep 07, 2010 12:42 pm    Post subject: Re: Help reading primers for pressure Reply with quote

Bushmaster wrote:

Primers are not an indication of pressure and should not be use as an indicator. Flattened primers (which is normal) indicate that you may have a bit of head space.

No disrespect oh wise sage and please forgive me for piping up but...

If you have a primer w/ zero radius left on it, yer OK?

A lot of things affect pressure, almost everything related to the cartridge and the gun affects pressure. Pressure is the result of a lot of factors and no two sets of factors are the same. Ever!

One of the only consistently readable tellers is the primer in most safe, normal published loads. It'll let ya know what's up long before something else does, in a lot of cases.

And the primer does the "in-out-in" thingy for most loads, regardless.

The primer is an awesome tell. If yer out of radius, yer most likely over the top, or on the cusp just asking for it, and need to back it down. And I don't care how accurate or fast it is. That's my advice to everyone FWIW.

All of my loads have a healthy radius left and are never anywhere near the MAX and they are safe and accurate and don't wear out the firearm.

I'll keep reading my primers, very closely, thank you very much. Very Happy

p/s- were talking manly rifles here, not girly calibers like 9mm and 40 cal. Razz
Back to top
View user's profile
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Tue Sep 07, 2010 2:19 pm    Post subject: Re: Help reading primers for pressure Reply with quote

p/s- were talking manly rifles here, not girly calibers like 9mm and 40 cal.

HA HA Hahahahaha

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
stovepipe
Super Member
Super Member


Joined: Sep 25, 2008
Posts: 4877
Location: Pine, Az.

PostPosted: Tue Sep 07, 2010 2:28 pm    Post subject: Re: Help reading primers for pressure Reply with quote

God made them two fer the ladies that caint handle a .45
Back to top
View user's profile
chambered221
Super Member
Super Member


Joined: Aug 17, 2007
Posts: 3455
Location: Lost for good !!!

PostPosted: Tue Sep 07, 2010 4:11 pm    Post subject: Re: Help reading primers for pressure Reply with quote

Bushmaster wrote:
Anyone pay much attention to cartridges fired in Glock 9mm and .40 S&W?

Hint...Hint.........They aren't round !!!



wtf Stovey, shoot a Kahr PM40.............I bet it turns you into one of them their girlies !!! Shocked

_________________
Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!

A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.
~George Washington
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Tue Sep 07, 2010 6:54 pm    Post subject: Re: Help reading primers for pressure Reply with quote

Bushmaster wrote:
Anyone pay much attention to cartridges fired in Glock 9mm and .40 S&W?

If primers were an indication of over pressure. Those would sure worry me.

Bushmaster, I don't reload my pistols so lack the experience to understand your comment. I have Glock 9's and 40's and just checked the primers. I didn't see any affects nor was I expecting to since they are load to 1/2 the pressure of my .270 Winchester.

What was I supposed to see?
Back to top
View user's profile Photo Gallery
Bushmaster
Super Member
Super Member


Joined: Jun 12, 2005
Posts: 11390
Location: Ava, Missouri

PostPosted: Tue Sep 07, 2010 6:58 pm    Post subject: Re: Help reading primers for pressure Reply with quote

Glocks tend to imprint the firing pin port [raised square].

_________________
I have one nerve left and yer standin' on it...

DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
LIBERTY A well armed sheep contesting the outcome of the vote...
Back to top
View user's profile
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Tue Sep 07, 2010 7:00 pm    Post subject: Re: Help reading primers for pressure Reply with quote

chambered221 wrote:
Hint...Hint.........They aren't round !!!

OK, the primers on my 9mm and .40 cal are round. The firing pins in my Glocks are rectangular. Does your "They" refer to the firing pins?
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Tue Sep 07, 2010 7:06 pm    Post subject: Re: Help reading primers for pressure Reply with quote

Bushmaster wrote:
Glocks tend to imprint the firing pin port [raised square].

Why would I use primers on a 9mm or .40cal to read pressure in my pistols when they are loaded so low to begin with that pressure wouldn't affect the the primers?

My .270 Winchester, however, can be loaded for pressures above 60,000 psi which is the situation beind discussed. I've watched the primers begin to flatten as the powder charge is increased. I've witness the ridge form around the firing pin when I loaded 0.2 grains over max, a ridge that isn't there with the load at max or below. I agree that there can be other signs of over pressure, but I think in my situation with the .270 Win., the primer is my best indication without additional test equipment.
Back to top
View user's profile Photo Gallery
PaulS
Super Member
Super Member


Joined: Feb 18, 2006
Posts: 4330
Location: South-Eastern Washington - the State

PostPosted: Tue Sep 07, 2010 10:28 pm    Post subject: Re: Help reading primers for pressure Reply with quote

Signs of over-pressure:
Sticky bolt - you're pushin' your luck
Expanded case head - she's gonna blow!
Cases that last less than ten reloads - either too much resizing or too much pressure.
cratered primers - might be too hot or too light a load or your firing pin hole might be eroded and there is too much play between the pin and the hole for it.

It has been a long time since I have had any of these so I am out of practice and might have missed some but I know that if I run into any one of these I need to drop the load - if two show up at the same time I need to really drop it or check my scales.

_________________
Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads
Back to top
View user's profile Send e-mail
Elvis
Super Member
Super Member


Joined: Jul 27, 2008
Posts: 9239
Location: south island New Zealand

PostPosted: Wed Sep 08, 2010 1:48 am    Post subject: Re: Help reading primers for pressure Reply with quote

also from past experience. my rifle doesnt like necksized rounds. it MAY have a bore /chamber slightly off line so I partialy resize and no probs. I dont know but could a similar condition be causeing the problems you are having?is this the rifle you rebedded on another post??? keep us posted you will be sure to sort it sooner or later.

_________________
You shot it You pluck it !
Them who eats the most duck eats the most feathers!
Back to top
View user's profile
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Wed Sep 08, 2010 5:26 am    Post subject: Re: Help reading primers for pressure Reply with quote

Elvis wrote:
my rifle doesnt like necksized rounds. ... I dont know but could a similar condition be causeing the problems you are having?is this the rifle you rebedded on another post???

My reloads are neck-size only and are shooting the best in his rifle. Yes, this is the rifle I bedded in another post. Thought reading primers for pressure was a topic in itself so posted separately. Boy was that the situation!
Back to top
View user's profile Photo Gallery
English Mike
Super Member
Super Member


Joined: Jan 08, 2007
Posts: 1709
Location: Whitehaven, Cumbria, UK

PostPosted: Wed Sep 08, 2010 2:37 pm    Post subject: Re: Help reading primers for pressure Reply with quote

For some good pictures of flattened primers & other issues. go here: stevespages.com/diagno...blems.html
Back to top
View user's profile
chambered221
Super Member
Super Member


Joined: Aug 17, 2007
Posts: 3455
Location: Lost for good !!!

PostPosted: Wed Sep 08, 2010 5:36 pm    Post subject: Re: Help reading primers for pressure Reply with quote

Bushy, I don't necessarily agree with you, but I don't disagree either.......but I did understand your analogy with the Glunks I mean Glocks !!!


Slim, the same principles apply to both pistol and rifle primers. The controlling factor is the thickness of the cup and the amount fire they have.

_________________
Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!

A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.
~George Washington
Back to top
View user's profile Photo Gallery
fnuser
Super Member
Super Member


Joined: Dec 23, 2008
Posts: 914
Location: S.W. Missouri, U.S.A.

PostPosted: Wed Sep 08, 2010 5:43 pm    Post subject: Re: Help reading primers for pressure Reply with quote

slimjim wrote:
Bushmaster wrote:
Glocks tend to imprint the firing pin port [raised square].


My .270 Winchester, however, can be loaded for pressures above 60,000 psi which is the situation beind discussed. I've watched the primers begin to flatten as the powder charge is increased. I've witness the ridge form around the firing pin when I loaded 0.2 grains over max, a ridge that isn't there with the load at max or below. I agree that there can be other signs of over pressure, but I think in my situation with the .270 Win., the primer is my best indication without additional test equipment.
I think you are on to something but what I noticed in your excellent photo's are the marks on the brass that circumference the base this can also be a sign that your maxing out depending on how shiny they are. This is a mark left by raising the bolt on a cartridge that isn't springing back from the initial expansion or pressure spike,

_________________
N.R.A. Endowment Member
Back to top
View user's profile Photo Gallery
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition
Page 3 of 9
All times are GMT - 7 Hours
Go to page Previous  1, 2, 3, 4, 5, 6, 7, 8, 9  Next



Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Valid CSS! Valid HTML 4.01!
Click to check if this page is realy HTML 4.01 compliant for speed :)

All logos and trademarks in this site are property of HuntingNut.com.
The comments are property of their posters, all the rest © 2011 by HuntingNut.com
Interactive software released under GNU GPL, Code Credits, Privacy Policy

.: Upgraded to DragonFly 9.2 by *Dizfunkshunal* :.