If you have a 20 bore that was proofed at 850 bar, which is 12,328.2 psi and load and shoot loads which are 8,000 psi or lower you are using loads which are 551.6 bar. While not fire cracker loads they will do the job. I have decided to take a middle of the road approach for my doubles which is to use a moderate load and adjust my shooting to that limitation. I know I am working well under what many consider Service Pressures. I have a load which should be more than safe for use in all my doubles which are sound enough to shoot.
You can even find loads which are in the 7,000 psi range which is 482.6 bar. From 7,000-8,000 psi I look for the load which seems to pattern best for hunting. For clay targets I am happy with them all. Find what you are looking for in load performance and work to having several options that are safe for your needs.
