I know how strange it seems to see such a big discrepancy in numbers.. And I'm not surprised by a high reading I got on IM - it's inline with what I had for last 10 months. It's the low one that surprised me.
I have an XLS file going back to the very first injection that I've done at night on July 24th of 2017 with total 111 records of injections, tests, dosages, comments, etc.. Here are few data points from it:
Date Inj Dose Frequency Total T
09/29/2017 IM 200mg 2x a week 1030
10/21/2017 IM 150mg 2x a week 922
11/28/2017 IM 120mg 2x a week 719
02/20/2018 IM 128mg 2x a week 912
04/27/2018 SubQ 150mg 3x a week 630
06/01/2018 IM 150mg 3x a week 1091
The IM dosage to total T correlation is pretty clear. The last one is outlier and I attribute the high Total T to higher low of a more frequent injection protocol since it's more smoothed out with higher lows and lower highs.
I only have 1 data point for SubQ, so technically it could be statistically irrelevant, but there are few other factors that support that the low total T number of 630 might be true. I'm very sensitive to E2 fluctuation and the reason I did the blood test on 4/27 was because I felt my E2 was creeping down too much. Thru my experience I learn that I could pretty accurately predict when it falls under 20. on 4/27 when my total T was 630, my E2 tested at 18.6. I was very skeptical since due to transitioning from twice a week to three times a week, I dropped AI from 1mg to 0.375mg per week while increasing my Test Cyp dosage from 128mg to 150mg. If anything I anticipated it would be high. I'm glad I listed to my body.
I felt changes starting SubQ within a week. My energy dipped down, I was more fatigued than usual. My skin cleared up almost overnight! So I think that my total T was pretty low while on SubQ.
Going back to IM, nocturnal erections came back strong, I got some mild acne on my chest and triceps. And my E2 on 6/01 registered at 29.2. So it all seems to align.
It would be nice to repeat the experiment, but I'd rather not waste 4 weeks on a protocol that didn't work well for me.
Again, this is not supposed to be bashing SubQ or anecdotal post. But maybe someone in puzzled in somewhat similar situation and this will make them pull a test and hopefully clarify something. As you mentioned I might be unique in the way my body breaks down test cyp when injected into fat and by no means I want people to follow my example.
My IM injections are side of the leg, 29-30G 1/2" (I'm very low BF), SubQ - abdominal, 31G 5/16".