Back in the day, I saw plenty of TC Patriots with broken stocks (I was requested to fix a few of them) that occurred in loading stands similar to the one pictured below. If one insists on seating the patch ball while in a stand, the support needs to be directly in line with the centerline of the barrel (‘yellow’ arrow) and NOT on the butt of the pistol. Supporting only the butt while loading puts a lot of strain on the stock at the top of the grip and through the lock area (‘red’ circle’). You are basically forcing the butt towards the barrel, kind of like closing a book. The weak point is where the pistol grip joins the rest of the stock and through the lock area. I suggest avoiding using a stand when seating the patched roundball.