Difference btw match and regular primers?

[sigguy552]

Can someone summarize what the benefits are of say fgmm match primers vs regular cci LR primers? I don't quite understand how primers can affect accuracy when it simply ignites the powder.

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[Divernhunter]

The match primers are more uniform. Thus a more uniform powder ignition and hopefully more uniform ammo/accuracy. To really get better accuracy you need to do other brass prep steps and such.

[tonyjr]

I only use CCI primers .
Not really sure what a fgmm primer is . Federal Gold Medal Match ?
The ones I use 90% are magnum the rest are either BR [ bench rest ]
or regular . BR primers were all I could find during the last shortage .
I prefer the mag ones - they burn a little hotter and longer .
To me I want the longer burn when using H110 . It is a slow burning powder .
About 25-30 years ago I decided to stick with CCI - their primers were / are a little thicker [ to me heavy duty ] and don't bend like some others .
I find I have less [ most of time none ] unburnt power .
Mag primers are kind of designed for ball powders . 95 %of my powders are Hodgdon ball . [ ball type powders are easier to meter - at least for me ]

[AandO]

As already stated: Uniformity.

As I understand it: Match primers are produced by the more experienced operators that produce the primers. Exactly how or why that would be I have no idea. A few years back I took some time and closely looked at some regular SRP's and concluded that indeed there is a slight difference in some of them. Some appeared to have more compound in them than others.

My question would be what is the difference between a match primer and a benchrest primer. Same animal?

[jandmtv]

There is zero difference between cci/federal match and non match primers. What makes a match primer is who is running the machine. When Their more experienced techs run the machine, they will take the middle of the lot and designate it match/BR. As far as mixture goes, its identical to non match. So save your money and use non-match. I haven’t noticed a single bit of difference between them.

[Ross]

There is zero difference between cci/federal match and non match primers. What makes a match primer is who is running the machine. When Their more experienced techs run the machine, they will take the middle of the lot and designate it match/BR. As far as mixture goes, its identical to non match. So save your money and use non-match. I haven’t noticed a single bit of difference between them.

The tech running the machine presses "start." How times does this need to happen to differentiate between a new tech and an experienced tech?

There are no calculations needed, based on the mixture, or alignment of the stars, which the tech uses to ensure the machine is stated at the most optimum time. Everything is automated.

[superdave50]

[Paul_R]

$5 to $10 dollars / 1000

[jtv3062]

I only use CCI primers .
Not really sure what a fgmm primer is . Federal Gold Medal Match ?
The ones I use 90% are magnum the rest are either BR [ bench rest ]
or regular . BR primers were all I could find during the last shortage .
I prefer the mag ones - they burn a little hotter and longer .
To me I want the longer burn when using H110 . It is a slow burning powder .
About 25-30 years ago I decided to stick with CCI - their primers were / are a little thicker [ to me heavy duty ] and don't bend like some others .
I find I have less [ most of time none ] unburnt power .
Mag primers are kind of designed for ball powders . 95 %of my powders are Hodgdon ball . [ ball type powders are easier to meter - at least for me ]

If cci brand primers are thicker then imagine how thick the cci NATO primers are

[tonyjr]

Back in the '70's , after I got my DD214 , I still kept in contact
with friends . I got a lot of brass . That when I learned the bottle
necks and 45's had to be watch . Primers would seat deep and
cases looked like they had more powder .
Then stacked primers were no big deal .
Now I won't even bother with them . All they are for now is training
/ showing about how to spot [ before you break / bend a decapping
pin ] and how to decap them .
[ I use a drill rod in Lee's universal decapper die ]
There are other good brands of primers out there , but not really
stocked locally . Hasmat costs to much .
BTW - I have told everyone all I want for Xmas is powder / primers /
bullets [ 6 nephews and 2 nieces reload here ] in your caliber . I have
plenty of socks / shirts / ties .

[Wrangler John]

It is my understanding that primers are made by hand, with technicians loading the wet priming mixture into the cups from a ball of putty like explosive. Then the remaining components are loaded and the anvils seated. When wet, the mixture is safe to handle.

Each manufacturer has a proprietary patented recipe for their primer mix, although this may not be as prevalent as it once was, as many brands are now made by outside vendors under contract. Still, there is much variation between primer brands, country of origin, brisance, physical dimensions, etc..

Primers also change over time as manufacturing changes from source to source. For example the Remington primers shown below were manufactured by DuPont in the 1970's, and both had two legged anvils that allowed for two opposed flash ports, as compared with today's three. I found these primers to deliver excellent accuracy over a wide range of cartridges. The Remington 7-1/2 Small Rifle primer was introduced in the 1960's to complement the introduction of the AR-15, M-16, as the original 6-1/2 Small Rifle primer cup was too thin to handle the higher pressures of the .223 Remington /5.56 NATO. Today only the Remington 7-1/2 Small Rifle BR primer is available, when both the 7-1/2 and BR versions once were.



Primers through the brands, sizes and brisance (Standard or Magnum), and lot numbers, vary considerably. Some powders and loads work best with one particular primer. The two targets below, 10 shots at 100 yards, were fired in the same rifle with different primers, either a Winchester WSR #6-1/2-116 Small Rifle Primer, or the Federal 205M Match primer. I expected the Federal to produce more consistency, but the Winchester performed better. Which means that I now work up loads using a variety of primers from Winchester, Remington, Federal, CCI, and Wolf, with the latter Wolf primers, especially the Small Rifle .223 Remington (NC223) also producing good results. CCI arrived on the scene when there were just Winchester, Remington and Alcan primers the only readily available to reloaders, CCI (Cascade Cartridges, Inc.) soon dominated the market and kept prices down with a reliable supply.

[Spanky8601]

http://www.sksboards.com/smf/index.php?PHPSESSID=2680267622fda400f518f383ee58da3b&topic=56422.0

Interesting read about primers if you understand it.

[McGuiver]

Difference btw match and regular primers?

http://www.sksboards.com/smf/index.p...&topic=56422.0

Interesting read about primers if you understand it.

Upon reading this and going down that rabbit hole, I stumbled into Lead Free priming compounds.

Good reading too.

https://archive.org/stream/DDNP_Diazodinitrophenol_A_Detonating_Explosive_By_L_V_Clark#page/n0/mode/2up

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