Otis,
I re-read your original post. I don't think you're headed for trouble. The hard bolt closing with the 7.62 rounds in a 308 chamber could be from the bullet engaging the throat earlier causing a bit of resistance.
If you're not inclined to reload your 7.62 brass, PM me and I'm sure we can work out a deal to get you more money to buy ammo or toys with.
Chris.
