I know this subject has been gone over time and time again. However I would like to get some answers specific to my situation. I've been all grain brewing for several months now. I'm using a 10 gallon cylindrical igloo cooler for my mash tun(see picture). My temps have all been right on. Been using the sparge pal app to get my strike water exactly right. Everything is going smoothly and I like all grain brewing a lot more than extract. However, when calculating my efficiency(using brewers friend.com) I'm getting between 60-70% efficiency and missing my OG by about 10. Not sure what I'm doing wrong. It's been like that for the last 5 batches or so. I thought about upping my base grain but isn't that a short term fix to a long term problem? Any suggestions would be appreciated.
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