Gas checked and paper patched soft lead can be pushed just as hard as copper jacketed...
https://www.youtube.com/watch?v=Q98H0-oLSlA
ADDING:
I apologize for getting sucked into replying to a zombie thread...
https://www.youtube.com/watch?v=Q98H0-oLSlA
ADDING:
I apologize for getting sucked into replying to a zombie thread...