A calorie is a measure of energy expenditure and stored energy. The calories referred to in diet (calories eaten) and exercise (calories burned) are kilocalories (kcal). One kilocalorie is equal to the amount of heat that will raise the temperature of one kilogram of water by one degree Celsius at sea level.
Break-In Procedures: 1  Clean barrel after each 3 shot group for the first 60 shots or more if needed. 2  Check to see if there is any visible copper fouling. 3  Take one of the clean dry bore snakes, soak with copper solvent, and run it through the rifle from chamber to muzzle 3 times and let sit for about 10 minutes.
1 Cut Rifling-Helical grooves are cut into the bore of the barrel with a metal cutting tool. 2  Button Rifling-Helical grooves are pressed into the bore of the barrel with a tool called a button.3  The metal is displaced rather than removed as in cut rifling. Button Rifling-Helical grooves are pressed into the bore of the barrel with a tool called a button. 2  The metal is displaced rather than removed as in cut rifling. 3  Forged Rifling-A barrel with an over-sized bore is placed on a mandrel which has helical ridges.