also, i was never much of fan of P22's test taper, either....
even 100 mg of exogeneous testosterone injected is going to suppress your own HPTA recovery.... P22 went on the assumption that it would help you recover for some reason, but what it did would limit how MUCH you could recover.
most young guys prolly produce more testosterone then that a week, but not that much more. 200 mg of testosterone a week typically pushes most guys up to the high range of testosterone levels, and obviously the farther away you get from the norm, the fewer people fall into that category.
if you take a look at this study, you'll see what various doses (25, 50, 125, 300 and 600 mg) of testosterone will do, compared to baseline after 16 weeks:
(side note: in the above study, they also injected a GNRH antagonist, so they could measure the effects of the individual dose of testosterone. so one could assume that 25 mg would not result in that low of a level, as your own body would produce enough to make up the rest...)
IMO, the test taper is only worthwhile in a few instances (drug tested athletes, athletes that cannot use SERMs for some reason) and is only worth doing if you take HCG along with the taper....