I had given up on getting any response. But my oh my! You not only responded, but also gave a tremendous education in adapters as well, not to mention the sources and links I'll be following up on.
I guess first I'll try the enlarging the primer hole of a cartridge, and doing as you did, making it take a primer.
By the way, can you detect a substantial difference in the brand name and model of primer you use, as to which is best, which is worse and so forth? In other words, the CCI M209s are said to be 'hotter' than others when used as intended in shotgun reloading.
And, what about the super-velocity pellets? I suspect they're really light...
Anyway, thanks again, and I'll be in touch as I move on in this endeavor. (I did buy a Beeman Grizzly pellet gun, with interchangeable barrels, .177 and .22. To tell you the truth, I like it, although, cocking it is a hard pull indeed...you've pretty much got to have the stock setting on at least your leg, a hard surface is even better...and recoil is higher than you'd expect a pellet gun to have).
So again, and finally, THANKS!