You would think that if it was over spec that they would be afraid of lawsuits.
There's a disclaimer on the box.
That is a good question. I have shot about 10ish boxes of buffalo bore through my Coonan and may be 4 more boxes in the past through my Marlin. Call me a fool if you like but when they claimed to me in SAAMI spec I believe them. I actually never thought to check it out online.
Buffalo Bore is not a member of SAAMI so their ammo may or may not be in spec. He used to claim that he was loading 357 to the old IIRC 42,000 cup pressure Saami is 36,000 psi. there's a difference in how it's measured. Some of their claims are (I believe intentionally) misleading.
a couple things I know to be true that seams to contradict their claims.
Very heavy recoiling loads will cause endshake at a lower round count than lighter recoiling loads.
Enough 125gr 1600+ FPS loads will eventually erode the forcing cone of any revolver and it will crack. I've even seen it happen to a GP100.
These issues can become dangerous if not addressed.
Ultimately if you're gonn push the limits knowledge of said limits is the key.
Does my 10mm have enough case support? How strong is my revolver?
What issues do I need to look for?
Deja,
I wouldn't worry about shooting BB in the Marlin it is plenty strong and there's no problem with cyl gap. If it was my Coonan I'd limit how much BB I put in it and watch for any signs of battering the slide or frame from recoil just like I would any other auto. I push my guns, but I know where the edge is and stay a safe distance from it.