I have not used the 20 ounce bottles like this yet, but I have had the same issue with smartwater bottles. I used both the 1.5l and 1l bottles pressurized to 80 psi and they don't go boom. The pellet passes straight through and the air hisses out. I think the problem may be the thickness of the plastic. Smartwater bottles seem to be made of a thicker plastic than most other brands. They are so tough that only 2 or 3 of them deformed around the bottom when I pressurized them to 80 psi. Hopefully other shooters will post which bottles bring the boom and which don't so we know which ones to use.