Piotr

Recipes 

I entered JZ Roggenbier recipe into BeerSmith, and it calculated way to high OG. I suspect that Rye Malt Grain Yield is set too high it this program - 81 %? same as Pils? What should be the correct value - 70%?

GilaMinumBeer

Recipes 

First, I would track down the name of the Malster if you can. Ask your LHBS.

If you already know who the malster is then just look for a generic malt analysis on their website. here is one from Briess,

http://www.brewingwithbriess.com/Assets/PDFs/Briess_PIS_Rye_Malt_WK.pdf

Looks like all they list is 76% FGDB.

david_42

Recipes 

It varies a great deal depending on the maltster, I've seen values as low as 63%.

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Piotr

Recipes 

I have it from Weyermann, they are pretty mysterius about the data of their products, but I'll try to find out.

GilaMinumBeer

Recipes 

Unfortunately, it's not very often we homebrewers can get a hold of run data. You might be able to get somewhere with your LHBS. Sometimes, my guy can get a batch analysis..