Hi all, does anyone know what the difference in power would be between a 209 shotgun primer and a Fed 215 LR primer? I'm makeing up some 12ga cases from 50 BMG brass and I'm thinking about putting a bushing in the BMG primer pocket to use a more economical primer.
thoughts?

No, I have no experience with this, and I do not want to eitheras I find it simply dangerous:

The function of the primer cup is not only to carry the igniter agent, but to seal the primer cup to the pressure.

With a bushing, it will be nearly impossible to perform this second function - unless you spend a considerable amount of work on installing the bushing in the cup.

Again: interesting idea, but a dangerous concept !

Shotshells are the one area of reloading where experimentation can yield dangerous results very quickly.
Changing a component in a standard load can be unsafe.
Primer bushings in a 50BMG case sounds downright scary.
The only safe way to do something like this is with blackpowder, smokeless may cause you to see a bright light that is not muzzleflash.

Just one guy's opinion.

Travis F.

The original 454 Casull brass was made with a large primer pocket, then they offered a bushing to use small rifle primers in it.

Yes and they have use thin bushings to put 50 cal
primers in 20 mm cases. Doing it myself and setting them
in with locktite.Ed.

As long as the bushings are press fit you will have no problem. As to the difference in power, it is quite a bit. If I recall correctly a 209 has a bit more than twice as much priming compound as a large rifle mag primer ( believe that came from Speer)

Thanks Rufus, I'll start makeing bushings for the shotgun primers.