Is it advisable, right or wrong, to "pre-drill" with Drill or End Mill prior to finishing off the job with the Ball End Mill.
OR, Just dive in and cut the whole thing with the Ball ?.
Last time I Riveted, I drilled part way and "eyeballed" to finish it with a Dremel. Took a while.
It's for Riveting AKs as you might have guessed.
Any guidance welcome. Thanks all.
Making TOOLING !!