OK, so I’m new to all grain brewing. This is my fourth brew recently after taking a several year hiatus from brewing. The last three batches of brood have all come out to different volumes. The first batch I brewed field about 39 12 ounce bottles. The second batch filled almost 50 12 ounce bottles. And this last one filled about 36 12 ounce bottles. My question is, how can I make sure that I receive 50 bottles of beer on each brew? I must be calculating something incorrectly. Any help is welcome! Thanks in advance!