What are these primers for?

[Jerbear]

My hunting buddy, went into the local sporting good store and as if the had primers.  They had Winchester 209 shotgun, and full box of Magnum small pistol primers.  I have several reloading manuals, but they are old, and don't list any hand gun using this primer.  Just like to know what they are used for.

[ICEMAN]

Arent they used to propel those plastic practice bullets, I think speer used to sell them for that?

[MHWASH]

38 Special, 38 Special +P, 357 Mag, 357 Maximum.

[AWS]

They were for use in the 357Mag with Win 296 and H-110 spherical powders as they can be harder to ignite especially in colder temps.

AWS

[dbllunger]

They can be used in any small pistol.  Just a little hotter then a standard is the only difference.