HuntingNut
HuntingNut
   Login or Register
HomeCommunity ForumsPhoto AlbumsRegister
     
 

User Info

Welcome Anonymous


Membership:
Latest: Tlg779
New Today: 2
New Yesterday: 0
Overall: 12739

People Online:
Members: 0
Visitors: 131
BOT: 1
Total: 132
Who Is Where:
 Visitors:
01: Forums
02: Forums
03: Forums
04: Forums
05: Forums
06: Forums
07: Home
08: Forums
09: Your Account
10: Forums
11: Forums
12: Home
13: Forums
14: Forums
15: Forums
16: Forums
17: Forums
18: Forums
19: Forums
20: Forums
21: Forums
22: Forums
23: Forums
24: Forums
25: Forums
26: Forums
27: Your Account
28: Forums
29: Forums
30: Forums
31: Forums
32: Forums
33: Forums
34: Forums
35: Forums
36: Home
37: Forums
38: Forums
39: Forums
40: Forums
41: Forums
42: News
43: Forums
44: Forums
45: Forums
46: Your Account
47: Forums
48: Photo Albums
49: Forums
50: Forums
51: Forums
52: Forums
53: Forums
54: Photo Albums
55: Forums
56: Your Account
57: Forums
58: Forums
59: Forums
60: Forums
61: Forums
62: Forums
63: Forums
64: Forums
65: Forums
66: Your Account
67: Home
68: Forums
69: Forums
70: Forums
71: Forums
72: Forums
73: Forums
74: Forums
75: Forums
76: Forums
77: Home
78: Forums
79: Forums
80: Home
81: Forums
82: Forums
83: Forums
84: Forums
85: Forums
86: Photo Albums
87: Forums
88: Forums
89: Forums
90: Forums
91: Forums
92: Forums
93: Forums
94: Home
95: Your Account
96: Forums
97: Forums
98: Forums
99: Home
100: Forums
101: Your Account
102: Home
103: Forums
104: Forums
105: Forums
106: Forums
107: Forums
108: Forums
109: Forums
110: Forums
111: News
112: Forums
113: Home
114: Forums
115: Forums
116: Forums
117: Forums
118: Forums
119: Forums
120: Your Account
121: Forums
122: Forums
123: Forums
124: Forums
125: Forums
126: Forums
127: Forums
128: Your Account
129: Forums
130: Forums
131: Forums
  BOT:
01: Forums

Staff Online:

No staff members are online!
 

Coppermine Stats
Photo Albums
 Albums: 305
 Pictures: 2378
  · Views: 572331
  · Votes: 1312
  · Comments: 86
 

Support our Advertisers

magnum vrs. large rifle primers
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
Go to page 1, 2  Next
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition

View previous topic :: View next topic  
Author Message
jimmybirdwell
Rookie Member
Rookie Member


Joined: Jan 29, 2010
Posts: 4

PostPosted: Mon Feb 15, 2010 6:58 am    Post subject: magnum vrs. large rifle primers Reply with quote

Hello folks. very nicesite. thanks.
Can some one tell me the pro or cons of using magnum primers in place of large rile primers.
Jim
Back to top
View user's profile
Bushmaster
Super Member
Super Member


Joined: Jun 12, 2005
Posts: 10742
Location: Ava, Missouri

PostPosted: Mon Feb 15, 2010 9:17 am    Post subject: Re: magnum vrs. large rifle primers Reply with quote

In most cases magnum primers are not necessary unless the load data manual says so for a particular hard to start powder.

If you are going to use magnum primers in place of standard large rifle primers, reduce your powder charge by 10% (Do not go below minimum charge). Work up slowly watching for over pressure signs...

And...Welcome to this fine site. Grab one of Vince's beers, pull up a stump close to the fire and join right in...

_________________
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
Grumulkin
Super Member
Super Member


Joined: Apr 16, 2007
Posts: 365
Location: Central Ohio

PostPosted: Tue Feb 16, 2010 7:28 pm    Post subject: Re: magnum vrs. large rifle primers Reply with quote

I frequently try magnum primers in cartridges where they're alleged not to be needed. Sometimes this substitution results in better accuracy.

It's alleged that magnum primers are needed with ball powders; this frequently isn't true and at times magnum primers give better accuracy with stick powders.

In medium sized (like the 308 Winchester) and larger cases, I've never had pressure problems in substituting large rifle magnum for large rifle primers.
Back to top
View user's profile Visit poster's website
gelandangan
Super Member
Super Member


Joined: May 07, 2006
Posts: 6005
Location: Sydney Australia

PostPosted: Tue Feb 16, 2010 8:42 pm    Post subject: Re: magnum vrs. large rifle primers Reply with quote

I might be wrong, but I thought that magnum primers gives out larger flame and burns hotter,
therefore ensuring more powder grains burns in the initial ignition.
Hence higher pressure on the chamber due to more powder burns at the same time.l

Magnum primers also have thicker metal cup thus can withstand higher pressure.

_________________
A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.

The government I trust .. is my .45-70 Government.

Do - Not try!


gelandangan.weebly.com/
Back to top
View user's profile Visit poster's website
gelandangan
Super Member
Super Member


Joined: May 07, 2006
Posts: 6005
Location: Sydney Australia

PostPosted: Tue Feb 16, 2010 8:45 pm    Post subject: Re: magnum vrs. large rifle primers Reply with quote

Um, and aah.. Welcome to the site.

_________________
A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.

The government I trust .. is my .45-70 Government.

Do - Not try!


gelandangan.weebly.com/
Back to top
View user's profile Visit poster's website
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7924
Location: Fort Worth TX

PostPosted: Tue Feb 16, 2010 9:12 pm    Post subject: Re: magnum vrs. large rifle primers Reply with quote

gelandangan wrote:
Magnum primers also have thicker metal cup thus can withstand higher pressure.

I know very little about primers other than my standard CCI and Federal primers work good in the .243, .308, and .270 loads. I have heard other shooters say the above is the only real difference between a standard and magnum primer. Then I also hear they burn hotter. CCI says they burn 23% hotter with longer flame duration. Is it possible that the features of magnum primers vary from manufacture to manufacture or size of primer?
Back to top
View user's profile
Pitt55
Member
Member


Joined: Aug 30, 2006
Posts: 104
Location: Prince George, B.C.

PostPosted: Tue Feb 16, 2010 11:07 pm    Post subject: Re: magnum vrs. large rifle primers Reply with quote

I don't know how much difference there is between std. and mag. I just go by the manual. I have done some testing between CCI and Win. and found I got higher velocities using Win. Not much but on average about 50 ft/sec. Maybe a guy should do some testing on the std. versus Mag. as well. Have to wait for spring for that tho.
Don

_________________
I thought I was wrong once, but I was mistaken!
Back to top
View user's profile Send e-mail Photo Gallery
Grumulkin
Super Member
Super Member


Joined: Apr 16, 2007
Posts: 365
Location: Central Ohio

PostPosted: Wed Feb 17, 2010 6:11 am    Post subject: Re: magnum vrs. large rifle primers Reply with quote

Believe it or not, NO ONE goes by the manual even if they're deluded and think they do.

Handloading manuals have data from pressure barrels for some data and for individual firearms for other data. Even if you use the same components listed, you gun will be different, your powder will have a different lot number as will your primers, etc. This means that in every case, you must either go with a conservative load from the manual or work up prudently evaluating for pressure signs. If you're one who works up prudently and know how to evaluate pressure signs, you can switch things like primers, cases and bulletes safely.

Now, if you're going to start a bonfire, will it make it much bigger if you start it with a hotter flame? Not really. Likewise, a primer is used to start a fire and doesn't have a lot of explosive material to add to the fire it starts. In medium to large sized rifle cases where the load isn't on the ragged edge of overpressure, you can interchange various primer types without a problem. I've done it many times.

In all times I've interchanged primers, in only two cartridge/primer combos was any adjustment in powder needed. One was when I tried CCI 250 large rifle magnum primers in 44 Remington Magnum loads with H110/Win. 296; in that instance I had to reduce the load by 1 to 1.5 grains. Another was in a rifle (257 Weatherby Magnum if my memory serves me well) in which Remington primers required about 1.5 grains more powder to equal performance obtained with other primers.

In some cases accuracy will improve with a magnum primer even in cartridges not called magnum. My 357 Herrett does significantly better with CCI 250 primers than with other primers I've tried. A bit over a year ago, there was an article in Handload Magazine in which the author did testing in a 308 Winchester using various components and testing for accuracy with Varget. Guess what? CCI 250 primers gave him the best accuracy. Of course, magnum primers probably degrade accuracy at least as often as they improve it.
Back to top
View user's profile Visit poster's website
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7924
Location: Fort Worth TX

PostPosted: Wed Feb 17, 2010 6:26 am    Post subject: Re: magnum vrs. large rifle primers Reply with quote

I use standard rifle primers. While shooting minimum loads in my 45-70 using H4895 and Varget, I notice that not all the Varget burns and there are powder granuals left in the barrel when I push a the cleaning rod through it. The Varget does not kick as much as the 4895 so I'd like to keep shooting the Varget. I was thinking a magnum primer might allow all the Varget to burn.
Back to top
View user's profile
Grumulkin
Super Member
Super Member


Joined: Apr 16, 2007
Posts: 365
Location: Central Ohio

PostPosted: Wed Feb 17, 2010 8:21 am    Post subject: Re: magnum vrs. large rifle primers Reply with quote

The reason not all the powder is burning and your gun doesn't kick as much with Varget is because the pressure is low. I don't know what kind of gun you're shooting. If it's a strong action like the Ruger #1 or Encore, you could increase the load a bit and solve your problem irrespective of which primers you use. If it's a weaker action, depending on which one, it might be best to leave the load where it is.
Back to top
View user's profile Visit poster's website
jimmybirdwell
Rookie Member
Rookie Member


Joined: Jan 29, 2010
Posts: 4

PostPosted: Wed Feb 17, 2010 10:03 am    Post subject: Re: magnum vrs. large rifle primers Reply with quote

Thanks folks, very informative. I have a N.E.F. 243 bull barrel that I resently just got to shoot 1" at 100yards and that is with 65 grain v max. bullets. I really like 100 grain bullets but the rifle just don't like them. I have had this rifle abou 4 years and have giving up on it twice. I may try a 10% reduced load and mag. primers and see what it does. I will also work on my 65 grain load to tighten up the group. Thanks again for the help and comments. Again this is a very good site and I hope to veiw it often and maybe help someone else with their questions.
Jim
Back to top
View user's profile
jimmybirdwell
Rookie Member
Rookie Member


Joined: Jan 29, 2010
Posts: 4

PostPosted: Wed Feb 17, 2010 10:04 am    Post subject: Re: magnum vrs. large rifle primers Reply with quote

Thanks folks, very informative. I have a N.E.F. 243 bull barrel that I resently just got to shoot 1" at 100yards and that is with 65 grain v max. bullets. I really like 100 grain bullets but the rifle just don't like them. I have had this rifle abou 4 years and have giving up on it twice. I may try a 10% reduced load and mag. primers and see what it does. I will also work on my 65 grain load to tighten up the group. Thanks again for the help and comments. Again this is a very good site and I hope to veiw it often and maybe help someone else with their questions.
Jim
Back to top
View user's profile
wiersy111
Super Member
Super Member


Joined: May 13, 2009
Posts: 2348
Location: Central Minnesota

PostPosted: Wed Feb 17, 2010 4:07 pm    Post subject: Re: magnum vrs. large rifle primers Reply with quote

I have used magnum primers in all my large rifle load and can't sat that there is any noticeable change in accuracy. Any changes could be chalked up to the shooter having a bad day.

_________________
A veteran is someone who, at one point in his life wrote a blank check made payable to "The United States of America " for an amount of "up to and including my life."

US ARMY RETIRED

The original point and click interface was a Smith & Wesson.

Being "Over the Hill" is much better then being under it!
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7924
Location: Fort Worth TX

PostPosted: Wed Feb 17, 2010 8:22 pm    Post subject: Re: magnum vrs. large rifle primers Reply with quote

jimmybirdwell wrote:
I have a N.E.F. 243 bull barrel that I resently just got to shoot 1" at 100yards and that is with 65 grain v max. bullets. I really like 100 grain bullets but the rifle just don't like them.

Jim, I tried to look up the barrel twist on your NEF but there is no data on their website. Call them direct at (866) 776-9292 and ask them what the twist rate is on your specific rifle. Then PM me or post it and I'll check to see if your twist rate might favor a particular bullet length (which relates to weight).
Back to top
View user's profile
Vince
Super Member
Super Member


Joined: May 25, 2005
Posts: 14118
Location: Brisbane AUSTRALIA

PostPosted: Thu Feb 18, 2010 4:20 am    Post subject: Re: magnum vrs. large rifle primers Reply with quote

Welcome aboard Jim...I see Bushy has organised a beer for you mate.

I have always been led to believe that the difference between a standard primer and a magnum primer can add up to roughly 1 extra grain of powder in the load.

I first saw the difference between the two primers when a mate used to play with the plastic indoor pistol cartridges that used a primer to propel the "bullet". Standard primers resulted in an inconsistent "group" and magnum primers put homes in his refrigerator door. Embarassed

Cheers, Vince

_________________
Cheers, Vince Cheers

Illegitimi non carborundum
(Never let the bastards grind you down)

Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.

"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done)
Back to top
View user's profile AIM Address MSN Messenger Yahoo Messenger Photo Gallery
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition
Page 1 of 2
All times are GMT - 7 Hours
Go to page 1, 2  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


Advertisements
 


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 :.