Has anyone ever tried reloading a 5.56 case with a .22 pellet and a std.or magnum primer?  Got the idea yesterday after playing with some Aguila Colibris in a Ceiner adapter, but I don't have any pellets handy to see if it is dimensionally do-able.

Thanks,
Jason

This might answer your questions:

http://www.alamanceind.com/newfol~5/nation_34.html

Yup.

I pushed a .22 pellet into the rifling of my Browning, then fired with a blank.  Judging by penetration into paper, I'd estimate that the muzzle energy was around 10 foot pounds.  Noise was about the same as your average American pneumatic air rifle.  I happened to have a average American pneumatic air rifle that puts out more than 10 foot pounds.

Edit: this was with a .22 rimfire rifle, not a primed .223 case

I once put a .22 pellet in my ruger 22/45, seated it in the rifling, then pulled the bullet out ofa long rifle and used the empty case. I fired it with just the primer power. THe pellet traveled all of 20'. They were daisy pellets, which are really just this lead subtance shaped like a pellet...

Never did that, but super-glued primers on the front of pellets many years ago...  Made a nice bang when they hit something hard.