I was rooting around in my barn Monday and I came across a canvas bag with about 300 semi-jacketed spitzer bullets. Where they came from I know not. They were truly showing their age. I ran them through my Lyman tumbler to knock some age off. These bullets measure at .308 diameter and weigh right at 150 grains. 30.06 ? .308 ? Want to make sure this neophyte uses this treasure in the right pop-gun.