I cant find the information in reloading manuals and if you measure a spent primer, they are not near .209?
Where does the “209” designation for shotshells come from and what does it mean?
MECpilot692X
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I cant find the information in reloading manuals and if you measure a spent primer, they are not near .209?
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It is a name.
Until Remington dropped it's number 57 primer, just about every Remington Peters shotgun shell up to the RXP used this.
Winchester, Federal, Alcan and Lyman shotgun shells used the 209 primers. After the AA hulls took over the market as one of the most reloadable hulls ever. The 209 primer is THE PRIMER, with Remington changing all it's hulls to use this primer.
But I find no history on who introduced the 209 primer.
Al
Until Remington dropped it's number 57 primer, just about every Remington Peters shotgun shell up to the RXP used this.
Winchester, Federal, Alcan and Lyman shotgun shells used the 209 primers. After the AA hulls took over the market as one of the most reloadable hulls ever. The 209 primer is THE PRIMER, with Remington changing all it's hulls to use this primer.
But I find no history on who introduced the 209 primer.
Al
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When you get the 209 answer tell me how Alcan got the 220 designation for the 220 Maxfire primer. LOL
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Primer Dimensions & Sizes
Rifle primers are .008” taller than pistol primers. Diameters are SR- small rifle primers at 0.175” (4.45mm) as are SP-small pistol. Their large rifle (LR) and large pistol (LP) cousins are 0.210” (5.33mm). Shotguns all use the 0.209” (5.31mm) #209 primers. Those into long range precision competition shooting the .50 caliber BMG use 0.315” (8.00mm) primers.
www.shootingrangeindustries.com
of course this chart contradicts the above
![Image]()
Rifle primers are .008” taller than pistol primers. Diameters are SR- small rifle primers at 0.175” (4.45mm) as are SP-small pistol. Their large rifle (LR) and large pistol (LP) cousins are 0.210” (5.33mm). Shotguns all use the 0.209” (5.31mm) #209 primers. Those into long range precision competition shooting the .50 caliber BMG use 0.315” (8.00mm) primers.
Live Fire Shooting Range | Modular Ranges | MILO Live
MILO Live, formerly Shooting Range Industries, LLC provides custom modular shooting ranges, training systems, equipment & accessories. Click to learn more.
www.shootingrangeindustries.com
of course this chart contradicts the above
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So which dimension is .209?Primer Dimensions & Sizes
Rifle primers are .008” taller than pistol primers. Diameters are SR- small rifle primers at 0.175” (4.45mm) as are SP-small pistol. Their large rifle (LR) and large pistol (LP) cousins are 0.210” (5.33mm). Shotguns all use the 0.209” (5.31mm) #209 primers. Those into long range precision competition shooting the .50 caliber BMG use 0.315” (8.00mm) primers.
Live Fire Shooting Range | Modular Ranges | MILO Live
MILO Live, formerly Shooting Range Industries, LLC provides custom modular shooting ranges, training systems, equipment & accessories. Click to learn more.
of course this chart contradicts the above View attachment 1786666
None of them
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Looks like the 209 refers to the primer itself and not the cup that makes the assembly
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Let us not forget that CCI once marketed a 109 which was the exact same dimensions of their 209 but had an uncovered flash hole as the only variable.
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Just for the heck of it I dug some fired Remington STS
primers out of the trash and measured just the primer cup. They were pretty consistent at .214.
![Image]()
primers out of the trash and measured just the primer cup. They were pretty consistent at .214.
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Primer sizes, more that you ever thought you wanted to know
OK, guys I have been curious about this primer sizing thing for some time. I had heard many experts dole out the facts, and the facts were different than my experience.So I thought that I woud do some checking. I only had WW and Cheddite to measure, so I measured the largest(Major) diameter of...
www.shotgunworld.com
Thanks to the guys on shotgunworld.com looks like it is the diameter of the actual primer cup.
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That would be a post-firing dimension
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I just measured the 4 brands of primers I have. The primer cup is the firing pin striking surface of the primer.
Brand. Primer cup O.D.
TR (Federal) 0.208
Wolf. 0.213
Cheddite. 0.2085
Winchester. 0.209
Not an official sample as I only measured 2 of each.
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