the lager test was my first test and i think i did not test it propyl could of been 1010 for all i know because it went to far pas the 10000 mark at one stage but i just thought it was reading wrong so i just used the one before of 1020. i waited for the hydrometer to come to a level were it was not going higher or lower on the others Mexican stout around an hour after tested first was the best.