You could just start with a new Winchester case and keep reloading that case with the components from some of your Kynock ammo and see how primer pockets hold up. If after 5 shots the primer pocket is still nice and tight then you have low pressure loads.

Mike

Yes, and I only suggested reloading a Winchester case since it is more of a known thing than the brass in the Kynoch.

If the primer pocket is tight after 5 shots pressures are very low. If after 5 shots the pocket is still tight but the primer goes in noticeably easier than when the case was new, then pressures are starting to get up there but are still quite mild.

If after 5 shots you can seat the primer with virtually no pressure then you are right at maximum for that brass.

Mike