Difference between 61/2 and 71/2 remington primers?

[sheepdog]

I cant find any info on their site about which is for what.

[Shiloh]

The 6 1/2 are for .22 Hornet, .218 Bee and similar. Lower pressure small rifle. The 7 1/2 for .222 Mag, .223 .30 carbine.

You can use the 7 1/2 in all listed, but not vise versa.

Shiloh