So I go downstairs to the offcuts pile and pick up the first piece of plywood I see:



12 gauge rifled slug.

You get better results if you use a backer board. The front of the hole is much cleaner.

Last edited by bridgman; 08/17/16 12:11 AM.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8