Absolutely none, with the qualification that I'm only talking about the Thunderbeast CB mounts, which use big triangular shoulder--huge amount of surface area compared to a flat barrel shoulder. Wipe the carbon off the mating surfaces and they go back to the same POI every time. A few other companies use this design, too, I think.
I've noticed that mounts that lock or ratchet do not seem to be consistent enough for serious shooting; probably better off using direct thread on those styles.
Good info. Appreciate it.
