I have just completed the first three weeks of ABBH 1. I have a question about how to determine the weight to use for the second three weeks of the program.

In the first, dips move in a progression of 5x10 at 60%, 65% and 70% of 1RM for each week. The second round calls for switching that to using 80% of 1RM in a 10x3, 4 & 5 fashion for each week.

I ended the first round with a 20 lb dumbbell (weak as shit, I know, but hey…). How would I figure what 80% is? If I go 20 lbs divided by 70%, I get 28 lbs (too light obviously for a 10x3); if I take 20 lbs plus bw of 173 divided by 70%, I get 275 lbs. So that minus bw of 173 = 103 lbs (too heavy).

I am trying not get get bogged down in the minutia here, so I could do trial-and-error, but this program is so abbreviated, only doing dips three total times, I don’t want to waste any of the workouts. Anyone have a good way to figure this? Or should I just take a few days between the phases and reset my 1RM numbers? Thanks for any feedback (flamesuit on).