500,

We are really picking nits now

All actions are designed to be well above the strenght needed. It's the high stress mechanical parts like hammers and ejectors that separate the brilliant designers from the pedestrian. Take the Perazi O/U skeet shotguns. They are million round actions. With my pre-war firearms, I'm not worried about the bores, but the internals. A typical barrel will begin to wear out at about 2000 rounds. I doubt the action/ejectors will last past 2000 rounds. Take a Merkel or Chapuis on the other hand and it will probably go 5000 rounds.

Blair