I usually set the spunding valve at around 17-20 psi. If I ferment in room temperature. But you need to calculate how much carbonation you want from a chart or an online calculator, if you want correct amount of carbonation.
Just used the gun for the first time.......disaster!!! The beer was far too "excited" and just frothed out the bottles. I lost over 3 litres in froth out of a 15L batch!!
I opened one bottle today, and no head, yet there was some carbonation. I think the fact I had to lose so much beer per bottle is prob the reason. Plus I couldn't leave a small headspace in the bottle as every time I tried to close it the beer just frothed up and out of the bottles.
So, reading the gun's instructions. It says to set the CO2 pressure to max 6PSI when using, which I did. But, it also said the reason for my probs are most likely over carbonation. Now, I took samples leading up to and on bottling day and in no way was the beer over carbonated.
This is how I carbonated, during fermention I let spunding valve get up to 15, but then it started to lose pressure and for the next couple of days it probably hovvered around 7. When I stopped the leaks in the cap I then cold crashed for 3 days at 15 PSI. Is this the problem, too fast carbonating at the end? I'm thinking if I can keep at 15 for the first 7 days, I'll then reduce to 10 for cold crashing, and even night before down to 6PSI for bottling pressure. I get the feeling the beer was over excited, like when you shake a can of coke, but it most definitely wasn't over carbonated.
Any thoughts?!