Good practice for universal head rivets is to file a flat carefully on the head then centre mark it for your drill starting point. Carefully drill the head so it can be removed, then carefully drill the shank until deep enough to remove the majority of the rivet material in the hole, without preicing the tail. If the rivet is a large diameter, I will drill at a slighty smaller diameter. Punching out the remains also involves supporting the joint from behind with a bucking bar if possible. Stringers and skins don't get cracked or distorted then!
