I misspoke before, the IIPA went from 1.093 to 1.024 so 74%, but that also included 5% dextrose in the grist.
both pitches were brand new, first gen batches - both used 2 vials in 2 stage starters - the IIPA i went up to 5L on the second stage. i don't buy vials over a month old, either.
mashed the IIPA (91% 2row, 4% c15, 5% dextrose) at 147df. my brewhouse uses RTDs, but I also double check at mash in with a thermocouple probe reader, and while i hit too low at mash in, it quickly got up to 147 and I hold well.
the ESB (89% MO, 7% eng med crystal, 4% golden naked oats) I mashed at 152-3 for a full hour. pH measured at 5.35.
Keep in mind, I have no problems with ANY other yeast I use - 001/US-05, 1450, 830, 833, which all give me results I expect.
I am curious if I am either pitching too cold (high 50s, letting it rise to ferm temp of 65-66). or if 65-66 is too cold, and I should be either fermenting warmer, raising to 68 quicker or both? puzzling because as Mark said, its purportedly fool proof.