What kind of primer pocket is this?

[RLP]

These are sized 308 but I have not seen this before. I think they are 30-06 cases resized because the necks are 17 thous thick. Anyone familiar with this? Thanks

 

[Dusty Stevens]

Crimped

 

[Longtrain]

Look like WW2 vintage 30-06 cases, made by Remington Arms in 1940, 43 and 44. The primers were crimped in place common for military ammo.

 

[RLP]

Thanks Longtrain, that's the same info that I researched but what I was asking about was how the crimp was designed. The deep groove in the head so the crimp could be made. Modern heads are basically flat with the crimp. I didn't remember ever seeing that before and don't plan on reloading them. Thanks again

 

[Papa Charlie]

The RA stands for Remington Arms Bridge Port, CT and the number represents the year. If is had RA H that would be for Remington Arms Hoboken, NJ. The number is the year of manufacture.

As for the ring around the pocket, it could be for crimping as Dusty said, but I have never seen that config before.

 

[PDS]

The primer crimp is an older version of an annular crimp which is the most common on US ammo. Resizing a 30-06 case to 308 win will give you a thicker neck on the 308.
Guys would do that when 30-06 brass cost a lot less than 308. It usually worked with most 308 chambers.

 

[NorCalMikie]

And that crimp can be turned off and reloaded with no issues.

 

[Bill K]

As others stated military and crimped primers were used. De-crimp and uniform pockets, tumble/clean the brass, then resize and reload and use it. Might have to trim necks.

 

[riflewoman]

It was very likely Remington Arms made ammunition that had a peculiar crimp for British service. I’ve only ever seen this crimp in Remington 30-06 that was made for British service. The speculation was to hide the fact that it was US made ammo and give the appearance of a large berdan primer as was commonly used in 303. Interesting theory.

https://sites.google.com/site/britmilammo/-30-inch/-30-inch-ball

 

[GotRDid]

CMP sold a bit of this a while back; good for plinking with my Garands.
GotRDid.

 

[Old Navy]

Removing those can bend a lot of decapping rods/pins.