Every can I've done in the past have worked flawlesly (over 300), however I think I stuffed up.
I was in a rush and maybe didn't wait quite long enough during Fermentation of my Red IPA. Carbed up in the keg and was good to go off the taps for a few weeks, then decided to fill some cans using my beer gun. We had a hot streak of warm days last week her in Perth, which seem to have kicked then cans back into fermentation and caused the lids to burst open.
Up side is I know my seams are all good, as it was the removable part of the lid that blew off.
Still happy as hell with the Canular.
Thanks for those photos. Yes that is exactly correct, your seam is prefect. When you get the cans pop the lids or pop up and deform before bursting this indicates your seam is stronger than the 90psi rating of the can. Most glass beer bottles are rated to the same pressure so even if you had this in glass you would have ended up with a similar problem. I know it's not always convenient and can take up a lot of storage space but you really can't beat keeping finished beer in the fridge.