primobolin

[binsser]

interesting wonder how they are able to get it to hold on sust 300 then ?? more solutions meaning more pinning pain???

[Bonaparte]

exactly SWM.........we never dose anything we brew over 250mgs/mL

The more soluble compounds can go well over 250mg/ml without issue.

interesting wonder how they are able to get it to hold on sust 300 then ?? more solutions meaning more pinning pain???

Different compounds are more soluble than others and can brewed at high concentrations without issue.
Primo just happens to be one that irritates tissue (like all boldenone derivatives) and is not very soluble in oil for a long ester, so anything over 150mg/ml would be crippling for most.