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difference in primers

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/27/2008 at 22:55
ckk1106 View Drop Down
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The reloading manuals I have usually list a specific primer that they used with a specific load.  Therefore, I've always used the primer listed.  Am I correct in that different manufatures' primers of same type, ie. large rifle, large rifle magnum, produce different pressures.  It's just a pain when I have everything ready to load... case, powder, bullet, but the store is sold out of Remington 9.5 magnum large rifle primers.   They have plenty of CCI250, I think that is large magnum, and plenty of WLRM, but not the one that is listed in the specific recipe.  
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/28/2008 at 09:38
8shots View Drop Down
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Primers do make a big difference. I could not find large rifle primers and used magnum primers on my 30-06, which was allready loaded hot. Every shot lead to the bolt sticking and had to be knocked open.
I do not think that you have to be brand particular, but certainly a magnum primer leads to faster ignition and higher pressures.
The CCI 200 is a large rifle primer and the CCI250 for the magnums.


Edited by 8shots - February/28/2008 at 09:39
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/28/2008 at 10:20
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Maybe this will help.
 
Ranked in order of power

Large Rifle = LR, Large Rifle Magnum = LRM, Large pistol =LP, 

Brand/type                Power Average            Range            Std. Dev

1 Fed Match GM215M        6.12               5.23-6.8               .351

2 Federal 215 LRM             5.69                5.2-6.5                .4437

3 CCI 250 LRM                  5.66               4.5-7.4                 .4832

4 Winchester WLRM          5.45                5.1-6.0                .2046

5 Remington 9 1/2 LRM      5.09                3.5-6.75              .6641

6 Winchester WLR              4.8                 4.1-6.0                .4300

7 Remington 9 1/2 LR          4.75               3.7-6.25              .5679

8 Fed Match GM210M         4.64               4.0-5.6                .3296

9 Federal 210 LR                  4.62               3.7-5.5               .3997

10 CCI BR2                         4.37               4.0-5.0               .2460

11 CCI 200 LR                     4.28               3.8-4.8               .3218

12 KVB 7 LR Russian           4.27               3.8-4.8               .2213

13 Rem 91/2 (30 yrs old)       4.16                3.8-4.8              .3427


Pistol primers

14 Rem LP                            4.47                3.2-5.6                .5171

15 KVB 45 LP Russian          3.89                3.3-4.2                .2232

16 CCI 300 LP                      3.18                2.7-3.5                .2406

17 Federal 150 LP                 3.11                2.6-3.5                .2090

18 Fed Match GM150M        3.05                2.6-3.7                .2299

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/28/2008 at 10:30
Dale Clifford View Drop Down
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primers across manufact. vary mostly in physical characteristics, ht. of anvil, thickness of cup,. ww primers are dimensionally smaller than cci or federal accross the board. military brass with crimped primers can, alot of the times, simply be deprimed and primed with ww, but when using federal or cci require the primer pockets to be swaged. cci anvils are higher than either fed. or ww and can cause problems in progressive reloaders. The chemical or thermodynamic differences along a series is more difficult. A fed. mag primer is "hotter" than a ww mag primer, whereas a ww LP mag primer can be as hot as a fed LP mag primer.

after load work up , switching accross the board, can cause excessive pressure, reduced accuracy, increased accuracy etc.

that is why it is better to buy large quantites of the same primer for all loads accross the board

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/28/2008 at 11:19
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Dale Clifford is right.  Once you have found the right primer, you should stock up on them.
 
It sometimes pays to check your (less than maximum) loads with different primers.  My .338 Winchester Magnum is significantly more accurate with Winchester large rifle primers than it is with Federal magnum primers. 


Edited by Longhunter - February/28/2008 at 11:21
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/28/2008 at 15:50
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Thanks guys.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/29/2008 at 02:21
8shots View Drop Down
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Some great info, thanks Big daddy and Dale!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/29/2008 at 07:51
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 I've heard people say that when it's cold they use a magnum primer instead of a large rifle.
 What do you think of that theory?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/29/2008 at 08:05
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Originally posted by OLRVRAT OLRVRAT wrote:

 I've heard people say that when it's cold they use a magnum primer instead of a large rifle.
 What do you think of that theory?
 
It would need to be really cold like - degrees. but I have heard of people doing it.But I would want to test it a few times first.
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/29/2008 at 08:22
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Originally posted by OLRVRAT OLRVRAT wrote:

 I've heard people say that when it's cold they use a magnum primer instead of a large rifle.
 What do you think of that theory?
absoluetly do this, when it gets colder the magnum primers will make sure that you get proper and complete burn i only have the one rifle (.280) that doesnt use a magnum primer and i still load it with a magnum primer any way, when you go to a mag primer think of it as adding another grain or so of powder to your case.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/01/2008 at 12:38
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You are spot on there pyro.  I also have the .280, and use Winchester Mag Primers.  In cold climates,  such as our in MN and WI it is a good idea.  I don't want to hear a "click" when that nice buck is out in front of me.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/01/2008 at 16:05
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yeah i did that in wyoming too, i really wanna try the fed. 215m match primers out for my magnums
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/01/2008 at 22:47
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In my last batch of 150 grain ballistic tips for the .280 I did use 210m Match Grade Primers and they worked out just fine.  In fact, used them to kill my buck this past year!  I had some difficulty finding them after that, and went to the mag rifle primers out of convenience. 
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