Guess my OG .

Here is all the information I have .

13lbs pale ale malt

2lbs Munich

1lb caramunich 2

(All wayermans)

Pre boil gravity was 1.063

Pre boil volume 7.5 gallons.

Boiled down to 5 gal but hydrometer is now useless .

If I understand it right I can work out my efficiency with my pre boil gravity and volume but this gives me an efficiency of 88% !! Seems too good to be true for me.

Te formula was grain x max ppg \ volume

Any help , insight or answers greatly appreciated . Cheers