I personally shoot for 10% +/- as acceptable.
More of the common mistakes we used to talk about here were things like measuring in a beaker instead of with graduated cylinders.
One of the best tools I used to use was steroidcalc.com. Man, plug in what you want and print out a perfect recipe. Now that’s an app I’d pay for.
And don’t get too upset with failures. I followed three different guy’s recipes for winstol water based injection and wasted a LOT of money failing. I could not get the powder into solution. Supposed to go into solution (ba, bb, ploysorbate 80) then crash as it hits the sterile water after filtering. I gave up. Injectable winny sucks anyway.
I’ve heard that and bases are hard to get right (as in not painful AF or filled with all guiaicol/EO(bases) , even micronized Stan Aqua , the sticky clumps stay at the bottom and you gotta warm or roll for a while , then shake the shit out of it ! That’s just to draw it up (then you best not put a higher gauge on or it clogs ! It is my fave daily for last 4 weeks (not the process of using it ) just the look and energy I get in the gym while on super high protein and low total kcals . It works so fast and powerful . Like your first Tren Ace blast 5 weeks in . Lol. Wonder if anyone ran just Winstrol- V

and Equipoise

, from the US veterinarian without test . I hear a lot of guys didn’t have or run testosterone ; just whatever their “guy” had , sitting in his IROC-Z or Trans Am!

. I’m sure someone has to have tried it , especially when it was so prevalent in So-SoCal !
Max