The short course can be fine. The issue is that when a cycle is long, it may be an acceptable loss of efficiency to fail to frontload and as a result have the first two or three weeks be weak, but in a short cycle that's too much of a loss. Levels should be high throughout the cycle.
Where the Tri-Tren
poses a disadvantage is that fairly exact frontloading can only be done with single-ester products. But it can be approximated with blends.
The Tri-Tren is a mix of 60 mg/mL each of the acetate, enanthate, and hexahydrobenzylcarbonate esters.
As you've barely started the cycle, this makes things easier. Pretty much we can treat it as a simple frontload with part of the dose already taken, and some of it remaining to be taken now.
The Tri-Tren would best be taken at least every other day due to its including the acetate ester. (If it were only the acetate, I'd really prefer every day.) So let's say the plan will be to take 0.75 mL every other day. (This will average slightly more than your 450 mg/week figure. If you want to be exact, then the value would be 0.71 mL every other day.)
Let's use a half-life of 5 days for both the trenbolone enanthate
and the hexahydrobenzylcarbonate. I don't know that that is exactly correct for either, but it's a reasonable guess.
I'm going to neglect the fact that the acetate ester has a shorter half-life, because there's nothing we can do about it -- it can't be dosed separately because it's in the mixture. And as it is making up only 1/3 of the mixture, the error won't be huge, it won't be in the direction of underdosing, and the difference will clear rapidly.
I am assuming your Tri-Tren is 180 mg/mL. If it is different, than the mL amounts below would need to be recomputed. (For example, if the concentration weren't 180 total mg/mL but 240 mg/mL, multiply everything by 180, then divide by 240.)
If your dosing rate is 0.75 mL every other day, then on average you're taking 1.875 mL per 5 days.
The correct frontload -- or about as correct as we can be, given that this is a mixture -- would then be 1.875 mL plus your usual ongoing dose of 0.75 mL. The total Day 1 frontload would be about 2.6 mL. The figure will be a slight overestimation because of the presence of the acetate ester, so rounding this down to 2.5 mL will be fine.
You've already taken 1 mL.
So another 1.5 mL of the Tri-Tren would be called for today.
Then the ongoing 0.75, or 0.71 (whichever you like) dosing tomorrow, and every other day after that.
The figures would be almost the same for the testosterone enanthate
. I would make it another 1.5 mL of the testosterone
enanthate today, and then move to about about 140-145 mg every other day if you are doing the injections with a large (3 mL) syringe. In that case it would be more convenient to combine the doses and have everything on the same schedule.
Personally, I'd rather take them daily at half the dose per day, using an insulin syringe intramuscularly, but that's me.