Rarely, if ever, got it with the pellets, switched to powders and got it fairly often. Dropped BB from the oil mix and back to extremely rarely. Conclusion is that "magic solution" that I used back in the day was mostly BA/minimal BB. BB seems to have a tendency to exacerbate that issue with Ace.
I coughed every inject of ace. Never with enan or hex.
I injected every day of each ester. If I hit a vein with other gear id get a slight cough. But with ace it was violent and painful no matter how much I aspirated.
ive coughed with tren a and e, a blend(tren a, test p, mast), and with test no ester. the TNE was quite fun, hit it pre workout, cough for a few minutes then lift some weights you aren’t used to pushing around.