Old post, but a reply is merited to protect people from stupidity. If your point of reference is "an illegal UGL" (Pharmacon.....I know their chef, BTW) than your claim is flawed.
As someone who has made many batches of test, who also holds a PhD and is bound by the laws of physics, chemistry, and biology, I can tell you that there is a limit to how much compound an ester can hold.
First, different esters hold different amounts, but in general the maximum you can get into a cc is 300 mgs, and that is done by blending 3 different esters. To illustrate, I made a lovely batch of test decanoate (105 mgs) enanthate (105 mgs) and acetate (65 mgs) for a total of 275 mgs. This was butter smooth.
However, I bumped the acetate up to 100 mgs on a second batch (total mgs per cc 310) and sure enough there was some mild PIP.
If you think you are injecting a legit 450 mgs per cc and that injection is PIPless, then you are not injecting 450, as a true 450 will have PIP, there is no way to get around this fact.