Jeffersonian,I want to say around two hours to get to 125. I ran to Sheets and Stuff to grab the Polder you see in one of the pics...that took an hour round trip because I also had to get a new boning knife there. Well, you know--I was already there, and it was on sale, and I had a 20%-off coupon in-hand.BTW, the sticker on the roast said 3.69 lbs, and if you use the 25-30 minute formula, then you end up with 1.54 and 1.85 hrs, respectively.Hope that helped.-Mike