If your sighting in a rifle or breaking in a projectile, for the best possible understanding of how that projectile and load will work for you, I recommend swabbing between each and every shot. That way you keep as much equal as possible. While the powerbelt might load easy enough, swab and then get it sighted in.

After you have the load and rifle sighted in, then start shooting two and three in a row to see how they react and what they would do in a hunting situation.