I used 400/ml test last year and it usually was sore , but nothing like prop which I'd never fuck with again.
When I mixed it with EQ is helped , but was unpredictable as far as the pain ; sometimes it would hurt, sometimes painless.
This time I cut the 400 with oil to 300/ml strength, and everyshot has been painless. This time it's also being mixed with Tren E , but I tried some at 300 alone, and was painless.