After some great results from washing denim at 60° C I decided to shrink my PIHXHS. That's the second soak/wash overall. Note these were hemmed to 36 in from the start.
tag 38
raw measurements

after 2x ~ 5h soaks (hottest tap water, no agitation) + 1x 30° C & 1x 60° C wash

Although sanforized (but unwashed) I could squeeze slightly above 1 in shrinkage in length. I'm pleased with the result once again. I can only recommend washing denim at 60° C if you're looking for more shrinkage and don't worry about too much of it as it can stretch back where needed with some wear.