Ironmaster sometimes i use testoviron Bayer and i can tell you the pip is huge even being 250mg per ml . So the PIP is part of the game if you have compound inside and offcourse test 400 is alot concentration ( have to give a huge PIP) . people that are sensitive with that should never use blends of high concentration products like test 400 and use the normal test E or Cyp . Also a tip : never shoot test 400 alone , always mix woth other compounds and you will see huge difference. When i use test 400 i never do more than half ml with 1ml deca and 1 ml tren ace or bolde