Gravity too high

[toylander]

I started brewing beer about 10 months ago with about 10 successful brews under my belt and no disasters.

Brewed a beer a couple nights ago following a recipe I did before.
The last time I got an OG of 1.050 and about 21 litres into the fermenter.
This time I got an OG of 1.070. I topped up with water to 23 liters to reduce the OG and got it down to 1.060.

My grain bill was 5kg maris otter and 200g wheat.

The only thing I did different was crush the grain myself for the first time with the malt mill that I made.

Not sure if I was getting poor efficiency before or just really good efficiency now. I don't know how to work it out.

Is 1.060 still too high? Will it have a strong taste of alcohol? Can I water it down with cooled boiled water when priming without loosing bitterness or flavour?

[Hairybiker]

I would leave it and try it. Personally I had one brew meant to be 1055 that came in at 1075, and it was a great brew!
Getting 1070 from 5K is very good. Did you stir the wort before taking the OG? As it can be stratified.

[toylander]

I had just transferred it to the fermenter from the brew pot, it was well mixed.

[Rookie]

The only thing I did different was crush the grain myself for the first time with the malt mill that I made.

My efficiency went up 14% when I used my mill compared to getting the grains milled at the LHBS.