I have been practicing barbox 8 ball with my higher deflection Schon shaft with a phenolic tip on it. And no chalk. I have run quite a few racks with it.
Magic Chalk is a scam at the price they charge. 99.9999999999% of miscues are due to bad stroke mechanics, not chalk.
Short Bus Russ - C Player
Statistics have shown that when someone calls themselves a C player, they are actually "at least" a B Player

Spimp <--- C+ player