I think they're more secure than pins because of the shoulder.
I counter sink the holes in the scale for the shoulder to sit in. It actually bolts the scale the tang, then I grind them down and shape them with the scale.
However, if you're drilling your holes to the same diameter as the largest part of the Corby bolt then they're just decorative.
At least that's my $.02. I'm sure someone with more experience and knowledge will chime in.