primer difference

[leadslinger]

can someone tell me the difference between
reg and bench rest primers?

What about magnum primers, in what loads would they be used?
lite loads?

Thanks

 

[soulchaser]

can someone tell me the difference between
reg and bench rest primers?

What about magnum primers, in what loads would they be used?
lite loads?

Thanks

Not into reloading yet, but I assume a .357 would take a standard primer, while the .357 Magnum would take the magnum primer.

 

[CROWCA]

Primers
Primers directly affect accuracy more than most people or reloaders realize. The primer is the only component in a cartridge that sets off a chain reaction of events. The first thing that the primer does is start the bullet moving out of the cartridge case and at the same time it ignites the powder charge which in turn pushes the bullet out of the barrel.
Some of the things that can dictate a certain primer usage are extremely hard or soft bullets, bullet seating depth, powder selection by burn rate and or amounts of powder used in the case.
Rifle primers are not the same by any means, there is a difference in the length of time which primers burn. Primers can be selected by heat or pressure range of which there are three.
Always keep in mind that between class a and class c primers there can be a hi-lo pressure difference of approximately 12%, if working at the high end of a cartridges pressure if you change primers change the powder charge as well.
1. Large Rifle Primers
Class A Large Rifle: Federal 210, Remington 9 1/2 primers will generate about 6% less pressure than class b primers and are well suited for faster igniting rifle powders like IMR 3031.
Class B Large Rifle: CCI 200 primers are well suited for medium range burning rifle powders like IMR 4320.
Class C Large Rifle: CCI 250, Federal 215 primers will generate about 6% more pressure than class b primers and are well suited for slower burning rifle powders like IMR 4350.
Note: Small rifle primers do not have a great a heat range variance as do large rifle primers but there are still three different pressure levels or heat ranges.
2. Small Rifle Primers
Class A Small Rifle: Remington 6 1/2
Class B Small Rifle: CCI 400
Class C Small Rifle: Federal 205
Just remember when it comes to custom handloading of rifle cartridges there is nothing cast in stone, it is all a matter of trial and error for each individual rifle.

 

[joe-nwt]

Not into reloading yet, but I assume a .357 would take a standard primer, while the .357 Magnum would take the magnum primer.

A.357 and a .357magnum are the same cartridge.

 

[AKD]

CROWCA I seated a bullet with no powder and just a primer wondering how far out it would go. it didant budge. I 100% agree with u still don't get me wrong. Primers are way more important than people think.

 

[mike shickele]

Primers
Primers directly affect accuracy more than most people or reloaders realize. The primer is the only component in a cartridge that sets off a chain reaction of events. The first thing that the primer does is start the bullet moving out of the cartridge case and at the same time it ignites the powder charge which in turn pushes the bullet out of the barrel.
Some of the things that can dictate a certain primer usage are extremely hard or soft bullets, bullet seating depth, powder selection by burn rate and or amounts of powder used in the case.
Rifle primers are not the same by any means, there is a difference in the length of time which primers burn. Primers can be selected by heat or pressure range of which there are three.
Always keep in mind that between class a and class c primers there can be a hi-lo pressure difference of approximately 12%, if working at the high end of a cartridges pressure if you change primers change the powder charge as well.
1. Large Rifle Primers
Class A Large Rifle: Federal 210, Remington 9 1/2 primers will generate about 6% less pressure than class b primers and are well suited for faster igniting rifle powders like IMR 3031.
Class B Large Rifle: CCI 200 primers are well suited for medium range burning rifle powders like IMR 4320.
Class C Large Rifle: CCI 250, Federal 215 primers will generate about 6% more pressure than class b primers and are well suited for slower burning rifle powders like IMR 4350.
Note: Small rifle primers do not have a great a heat range variance as do large rifle primers but there are still three different pressure levels or heat ranges.
2. Small Rifle Primers
Class A Small Rifle: Remington 6 1/2
Class B Small Rifle: CCI 400
Class C Small Rifle: Federal 205
Just remember when it comes to custom handloading of rifle cartridges there is nothing cast in stone, it is all a matter of trial and error for each individual rifle.

I'm going to respond in a way that is a little easier to understand; primarily because I don't even understand what the hell your talking about with class A,B, &C primers, and I've been handloading since I was 12.
The difference between magnum and non-magnum primers is either burn intensity, burn duration, or both. Magnum primers are needed for situations where your trying to burn large volumes of powder, your attempting to ignite a powder that is difficult to ignite (ball powders), or your shooting in sub-zero temperatures. You generally want to use the primer that has enough power, but not so much that it has an abnormally high effect on the whole ignition process. In saying that, it's better to have too much versus too little ignition. For my rifles I have always used CCI magnum primers (either large or small) with great success. When primers are made, the company generally has about 10 machines going on the production line, and there are some people that operate those machines better than others. A benchrest primer is generally made on only one machine for absolute consistency, by the people that do the best job on the regular line.
Mike