When selecting a lifter gun for long term shooting, you should probably look for one with a radiused junction between the water table and the breech face. The earlier square joint is more prone to breakage at that point. However, I don't recall seeing a lot of broken lifter actions of the earlier type. This is probably because lifter guns don't get a lot of action today. A reasonable caveat would be "Don't shoot any heavy loads in square joint actions."