Yeah, seems strange. But like I said, just try searching & you’ll find others through more than the last decade, who were looking at the same problem & using the this method. But all was actually fine. They loaded ammunition to proper Loading Manual COAL & recipes, and found good accuracy with no pressure problems. And the ones I found were 6.5x55 Swede specific! So, we might just overthinking it. Kinda like when people decide a Savage barrel is TRASH because they used a Bore Scope, without ever testing it.

Maybe try some factory ammunition first?