ok silver, it hurts more if the ba concentration is high, i know people that make 600 per ml test that doesn't hurt any worse than 250. however, take test 400 for example it had a high ass ba concentration and it crippled people. wotan pharma out of the netherlands has great test e 600, test 500 with 300 e/200 cyp. and they have a tren stacker that is 150/ml with 50mg of enth, 50 of acetat, and 50 of hex. they are new so no fakes and they make great shit, their deca 300 is awesome as well, next cycle i will be using their eq so i'll let you know on that