Short esters til 2 weeks out. Mast primo sounds like prostate will be aggro. Up the winny and split am pm. No oilly pins/esters in system to linger and hold water.

Appreciate the clean stats and the clarity, let’s break this down like it’s peak week.

Your Plan:

Test – 600mg/week

Mast – 500mg/week

Primo – 400mg/week ?

Winstrol – 25mg (Wk 6–12), 50mg final 4 weeks

You’re basically running a dry-as-hell, Dorian-Yates-meets-Men’s-Physique prep stack. Respect.

Now the elephant in the room: Mast + Primo.

Let’s clear the bro-science fog for everyone watching:

“Will Mast + Primo dry me out more?”
No. That’s not how drying out works. Neither compound is a diuretic.
Mast and Primo don’t “dry” you , they don’t aromatize, so there’s no extra estrogen holding water. If you’re already lean (which you are), they’ll enhance that hardness. Think: paper-thin skin, tight grainy look.

Running both together-- Totally fine. They both bind well to SHBG, increase free test, and give that cosmetic polish.

BUT… here’s the real talk:

They’re both DHT derivatives, which means you’re doubling up on similar pathways. No synergy here, just redundancy.

If money ain’t a factor and your hairline is already holding on for dear life, cool. Run it. You’ll look like an anatomy chart in motion.

But if you want more bang for your buck, here’s the refined version:

Steroid King-Approved Prep Stack (16 Weeks):
Test E or C – 500–600mg/week (base)

Mast E – 400–500mg/week (polish, hardness, mood boost)

Primo E – DROP or swap for EQ 400–600mg/week if you want mild fullness and appetite support

Winstrol – 25mg/day Week 6–12, then 50mg/day last 4 weeks (oral or injectable, your joints will tell you)

If you really wanna level up dry conditioning:

Final 4 Weeks Add-Ons:
Proviron 50mg/day – More SHBG binding, more free test, more grain.

Halotestin (if you’re a psycho and want to suffer beautifully) – 10–20mg/day final 2 weeks only. Liver and rage warning.

Bloods & Reality Check:
Saying “blood markers are perfect” while on cycle is like saying your liver's fine while drinking vodka through a straw. It’s good until it’s not. So props for monitoring, but don’t let that lull you into thinking you’re untouchable.

Stay on liver support (TUDCA, NAC), hydrate like it’s your job, and don’t be scared to pull lipids mid-cycle. Winstrol and Primo will hate your HDL.

Final Thought:
Your cycle is clean. Primo won’t hurt, but it might not help enough to justify the cost or redundancy. Mast alone is nasty at your level of leanness.
If your prep game is tight (diet, cardio, posing, sodium), you’ll look peeled regardless. The drugs are just the frosting, don’t forget the cake.

Stay dry, stay deadly, and bring home the Crown!!!!!

I like the compound choice and the doses of mast and primo. Personally I’d be running the test lower, or atleast lower it as you get closer to the show, like 8 weeks out cut it in half.. If this cycle has worked well for you in the past then I’d stick with it. And primo will enhance if further. There’s an argument to be made to switch to test and mast prop closer to the show, but I wouldn’t If this has worked for you before.

16 weeks of winstrol...smh

I personally didn’t see a difference with primo until I ran it at 600mgs+. I know a lot of gents that would say you’d better off dropping the primo and running tren ace those last 2-3 weeks.