Re using grain

[Copper_clad]

Does anyone use any of the old grain in a new mash?

[BlackStrap]

Does anyone use any of the old grain in a new mash?

Copper_clad what do you mean "old" grain?

I've used spent grain after a beer brewing day...
1)Dump grain into fermenter
2) add water
3) add sugar to reach a 1.070 - 1.090 gravity

You have a sugar head or gumball head wash flavored with grain...

I've had drinkable results, flavored with oak it gets better with time.

[Copper_clad]

Yes spent grain from a shine run. Add that with the backings can you get sour mash

[still_stirrin]

I sparge...so, I don’t ferment “on the grain”. It’s the way I prefer to do it and I like my product just fine.

I put my “used grain” on the garden. That’s how I “reuse” it.

To each...his own.
ss

[kiwi Bruce]

Spent barley for bread baking...never used it to re-do a brew

[bilgriss]

Your question is about using spent grain in a new mash. You won't get much of anything mashing grain a second time. The enzymes are spent, and unless you had poor results in the first mash, most of the starches are gone too.

Many people follow Jimbo's Gumballhead protocol, and can get good results in a sugarhead with spent grains. Check out the descriptions and comments in that recipe's thread and you'll get some pointers.