Expected higher OG

[Willbrew]

I brewed a ipa which had the following grain bill:

7 lbs 2 row us pale malt
7 lbs flaked rye malt
1 lb malted oat
1 lb 20L caramel malt
1 lb carapils

I was exoecting an og of about 1.081 but ended up with 1.060. My mash temp was 155f for 75 min. And mash out was 10 min at 190. Boiled for 75 min and ended up with about 5.25 gallons.

What did I miss?

 

[MalFet]

It could be a lot of things, but anything we could say would just be a guess. Check out kaiser's test procedure for your next beer:

http://braukaiser.com/wiki/index.php?title=Troubleshooting_Brewhouse_Efficiency

The only thing that jumps out at me (without knowing your system) is that that is a lot of flaked rye. You might be having conversion problems, perhaps due to limited agitation.