I threw together a few rounds today to break-in the barrel. An assortment of 150 gr. Nosler Solid Base BT's, 160 gr. Speer BT's, and 160 gr. Speer SP's over WXR. Shoot/clean/shoot/clean, etc for the first five rounds, then I fired four in a row, cleaned, then fired my last five shots. My 13 shot...