Howdee Hard Mouth.
I have used Federal paper shells, plastic shells, and brass.
The Magtechs should be fine.
I do suggest a slight roll crimp.
And I do not suggest anything other than real BP.
Its fun, its kewl, and its the safest.
Stoke'em & Smoke'em
![Grin ;D](https://www.cascity.com/forumhall/Smileys/cowboys/grin.gif)