Pecking could actually be bad for the bits, especially something that small. With pecking, you’re repeatedly going from no load on the bit to some finite load in a short period of time. Which carbide especially might not like due to its brittleness. This page recommends not pecking until you hit 3X the drill diameter worth of depth:
https://zero-divide.net/?shell_id=151&article_id=4242_programming-efficient-peck-drilling-cycle
An older thread about carbide circuit board drills in aluminum (not quite as small as 0.043"):
https://community.carbide3d.com/t/carbide-circuit-board-drills-in-aluminum-highly-recommended/36949