My belgian tripel has had two bottle bombs after being in the bottles at 72F for over 7 weeks. This is very strange to me. The beer is delicious and got 78% apparent attenuation. I gave it about 2.7 volumes of CO2. I think this might be the issue. I want to submit this one for a competition, but I certainly don't want to hurt anyone! I'm thinking to carefully put the bottles into cardboard boxes and give them a good rattle. Any bottles that are on the verge will be set off by that, and the ones that survive that should survive just fine once chilled. I've heard about people venting and resealing. Any other tips?