Well back when money was sloshing around everywhere a new bit was included in every big job. Not so much anymore but I'd still rather pull back a bit and slam it through the nail than make a bunch of holes I can't use, or properly explain. I can sharpen them a few times, it's when they hit something really resistive like a sandwiched plate that was impossible to see and bend that I'm out the bit.
The auger usually pulls the nail through Greg, requiring diags to get it off the bit usually. They're usually just pesky shear nails