Federal Match AR primer ??
- Thread starter granite wagon
- Start date
They have more anvil protrusion and greater space between anvil and material to resist slam fires when a semi bangs em around.
Can’t speak to cup thickness or charge.
Edit: go fuck yourself haney. get off my nuts faggot.
Can’t speak to cup thickness or charge.
Edit: go fuck yourself haney. get off my nuts faggot.
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A quote:
– Cases that utilize small rifle primers and operate at moderate pressures (40,000 psi) can use CCI 400, Federal 200, Rem 6 1/2, or Win SR. Such cases include 22 CCM, 22 Hornet and the 218 Bee. Other cases that use the small rifle primer can use the above primers only if moderate loads are used. Keep to the lower end of reloading recommendations.
– Cases that utilize small rifle primers and operate at higher pressures (55,000 psi) should use CCI 450, CCI BR4, Fed 205 and Rem 7 1/2.
Another factor which determines the strength of a primer cup is the work-hardened state of the metal used to make the primer cup. Most primers are made with cartridge brass (70% copper, 30% zinc), which can vary from 46,000 psi, soft, to 76,000 psi tensile strength when fully hardened. Note that manufacturers specify the hardness of metal desired, so some cups are definitely “harder” that others.
I find larger variation in weight (light/heavy outliers) with the #41 primers than with the #450.
– Cases that utilize small rifle primers and operate at moderate pressures (40,000 psi) can use CCI 400, Federal 200, Rem 6 1/2, or Win SR. Such cases include 22 CCM, 22 Hornet and the 218 Bee. Other cases that use the small rifle primer can use the above primers only if moderate loads are used. Keep to the lower end of reloading recommendations.
– Cases that utilize small rifle primers and operate at higher pressures (55,000 psi) should use CCI 450, CCI BR4, Fed 205 and Rem 7 1/2.
Another factor which determines the strength of a primer cup is the work-hardened state of the metal used to make the primer cup. Most primers are made with cartridge brass (70% copper, 30% zinc), which can vary from 46,000 psi, soft, to 76,000 psi tensile strength when fully hardened. Note that manufacturers specify the hardness of metal desired, so some cups are definitely “harder” that others.
I find larger variation in weight (light/heavy outliers) with the #41 primers than with the #450.
It makes reference to the 205 . That and the AR designation accompanied by the info on anvil / cup spacing.
Can kinda do the 2+2 thing
Can kinda do the 2+2 thing
Federal Primers in general tend to have softer cups and are more sensitive. The fact that Federal chose to put out these primers would tend to indicate that the cup is stronger to be more resistant to slam fire and fire pin denting which is an AR issue. Whether it is harder or thicker is hard to say as both would tend to achieve the same result. As to compound I suspect it's hotter since they went to the trouble to make it meet mil-spec sensitivity. I would treat it like a Rem 7-1/2 or CCI 41.
yes, we all 'would'. but are they like that?
Mix is the same as in the standard small rifle primer. The primer cup is thicker, as is the anvil. The thicker cup and anvil "should" desensitize the primer a bit, and "lessen" the chance of a slam-fire. Federal primers are in general, more sensitive than CCI and less tolerant of firing pin blows during loading into the chambers of the M1 Garand, M1-A, and AR platforms.
Mix is the same as in the standard small rifle primer. The primer cup is thicker, as is the anvil. The thicker cup and anvil "should" desensitize the primer a bit, and "lessen" the chance of a slam-fire. Federal primers are in general, more sensitive than CCI and less tolerant of firing pin blows during loading into the chambers of the M1 Garand, M1-A, and AR platforms.
Just out of curiosity I sent a question to Federal this morning questioning whether to consider the primer as a "standard" or "magnum" and the answer was "standard".
I have to admit that I found that a little surprising.
That's true. And the reality is it's probably not needed for the case capacities that the SR primers are normally used in.
Somewhere in the back of my mind I remember reading that there was an issues with primers and ignition and the solution was to add material that added particles to compound to help ignition. May have been in Hatcher's Notebook.
I have used the AR-Match primers extensively. They are not hot like the CCI #41. They do however have great ignition characteristics. When used with the normal match type powders, velocities are very consistent.
I recall reading something similar decades ago about glass or silica particles added for that purpose.
I tried digging a little deeper into the whole primer issue and stumbled into this old paper about an issue between the Army and Federal.
I did find out that the #41 and #34 primers are the same compound.
I did find out that the #41 and #34 primers are the same compound.
With my loads for the AR I found zero difference with my 75/77 8208 load using the regular Fed Match and AR match. I never had any issues with the regular match primers with slam fires or any problems at all. I have both and interchange depending on the box I grab that day.
