RE: Sharp Broadheads?? Gotta ask??
Technically speaking it will stay sharper for a longer period of time.
Which I do not believe to be an issue when it comes to broadheads...unless a person can not afford to properly sharpen, replace blades, or buy new ones altogether.
Physics provides a clue for the reason why serrations tend to stay sharper longer than a straight knife edge. A circular shape is stronger than a straight line, which applies directly to the radius on the scallop vs. the straight knife edge design. A scallop edge tends not to fold under like a straight knife cutting edge. The edge of a serrated blade is also longer than that of a straight edged blade of the same overall length, therefore, an increased edge length is applied to the material being cut. This means that more material can be cut before the serrated edge is dulled.
Worthy to note is that you can actually get a straight edge too sharp. This might ridiculous at first, but the fact is what makes a straight edge first cut into an object is the same principle behind serrations. A straight edge blade must possess micro serrations to initially break through the surface of the object being cut. Field testing has shown that a perfectly honed and polished edge will shave the hair from your arm, but it will not easily slice through the surface of a tomato. Before any material can be cut through, the cutting edge must (first) be able to easily break through the surface. The ultimate straight edge not only must be sharp, but it must also possess "micro" serrations. These micro serrations are put onto a blade during the final sharpening (grinding) stage. Honing, buffing, and polishing the edge can remove them.