Mashing question

[nuggitmv]

Hello,
I mash in a coolbox I preheat the box I then heat the mash liquor to 77oc then drop all 11 litres through a tube into the mash tun having thrown away the preheat water.I stir well and see the temp at 72oc. I then over aperiod of 2mins empty the enamel bowl of grain while stirring I have no dry spots this way. this settles at 65oc to 67oc. I am so used to doing it this way do you think I am wrong to empty all the liquor at one go could it possibly shock the grain in any way? please advise.

this is the way i do it no dry spots even temp :party: