I am a believer in the break-in process. These guns are machined to high standards, tight standards, and they need to be shot with some heavy stuff to knock off the tight edges, if you will. Some don't need it, some do. Lube it well, including the bolt rails, shoot some heavy loads through it, keep it tight on your shoulder, and it should be just fine. If you don't run some high brass through it, it will be o.k., it will just take longer to get the break-in process over with. I have a Vinci, and it shoots great. Enjoy your new gun..Mike