I just made a IPA and with an estimated efficiency of 60% (since that is what I usually get not sure how to improve it) I should have a OG of 1.076 and a FG of 1.021. The problem is I just measured the FG and it was 1.012.
Now my main concern is that means my efficiency is only 40%. I did not have a hydrometer at the time I made this so I didn't get an accurate OG is there a way to back calculate OG from FG.
Here is the recipe http://hopville.com/recipe/1280963/american-ipa-recipes/ipa-test and here is my procedure.
I heated up 2 gallons of water to 170 degrees and poured it into my mash tun (a plastic 5 gallon bucket) and waited till it cooled down to 165 and then added the grains (all double milled 6lbs of 2-row, 11oz of special B, and 6oz of Crystal 60L). The temp dropped to 150-152 (lower then I wanted) so I lidded up the bucket and wrapped two towels around it to insulate it. 30 min later it had dropped to 145 so I heated up another quart of water to 165 added it in and raised it back up to 150-152 or so. Mashed for another 40 min. I then heated up a gallon of sparge water to 170 and sparged the grains to make 3 gallons total. I boiled this and added the hops as normal and ended up with about 1.9 gallons what i was shooting for since I was only doing a 2 gallon batch.
Now I was really shooting for a good Double IPA of about 7.5%ABV but this FG reading of only 1.012 means I might possibly have a much lower beer. So is it possible for the yeast I used (US-05) to have gone nuts and consumed that much sugar dropping my FG that low or is it more likely my efficiency is super low like 40% like I fear? Would the lower mash temps mean that I released a lot of fermentables so it just finished dry and I do have a much stronger beer of 8.4% (as per brewers friend ABV calculator based on the projected OG from Hopville) Since I didn't have a hydro at the time I finished making this I do not know what the OG was, I know that is a valuable piece of info and on my last few beers I have been using it so I know my OG and FG.
Thanks for you help.
Now my main concern is that means my efficiency is only 40%. I did not have a hydrometer at the time I made this so I didn't get an accurate OG is there a way to back calculate OG from FG.
Here is the recipe http://hopville.com/recipe/1280963/american-ipa-recipes/ipa-test and here is my procedure.
I heated up 2 gallons of water to 170 degrees and poured it into my mash tun (a plastic 5 gallon bucket) and waited till it cooled down to 165 and then added the grains (all double milled 6lbs of 2-row, 11oz of special B, and 6oz of Crystal 60L). The temp dropped to 150-152 (lower then I wanted) so I lidded up the bucket and wrapped two towels around it to insulate it. 30 min later it had dropped to 145 so I heated up another quart of water to 165 added it in and raised it back up to 150-152 or so. Mashed for another 40 min. I then heated up a gallon of sparge water to 170 and sparged the grains to make 3 gallons total. I boiled this and added the hops as normal and ended up with about 1.9 gallons what i was shooting for since I was only doing a 2 gallon batch.
Now I was really shooting for a good Double IPA of about 7.5%ABV but this FG reading of only 1.012 means I might possibly have a much lower beer. So is it possible for the yeast I used (US-05) to have gone nuts and consumed that much sugar dropping my FG that low or is it more likely my efficiency is super low like 40% like I fear? Would the lower mash temps mean that I released a lot of fermentables so it just finished dry and I do have a much stronger beer of 8.4% (as per brewers friend ABV calculator based on the projected OG from Hopville) Since I didn't have a hydro at the time I finished making this I do not know what the OG was, I know that is a valuable piece of info and on my last few beers I have been using it so I know my OG and FG.
Thanks for you help.