What he saidLoading for a gas operated gun is different than a bolt action gun. Do yourself a favor and buy the Sierra manual, it has a whole section on reloading for gas operated guns. It goes over slam fires(seat your primers deep), case selection(dont buy military), which primers are better(harder cups are needed), neck tension, and proper case sizing, and other important things. There are 18 pages devoted to loading for a gas operated gun, read them. What gun did you buy? My Rock River 18 inch 1in8 twist will shoot 5 shot 1/2 groups with cheap ammo. Have fun.
I have some wolf ammo in .223 that won't chamber in my bolt action rifle.
Some bolt action rifles come with really tight chambers, and most steel cased craptacular ammo does not follow spec very close.
My Mini-14 will shoot Wolf ammo all day long, but you'd better not plan on hitting anything small.....