Ampoules at 300 mg/ml are less common than vials at that strength, and that combination is what Magnum Test-E 300 offers: ten sealed one-millilitre units, each carrying 300 mg of testosterone enanthate. Magnum Pharmaceuticals uses the same elevated figure across both its Test-C and Test-E products.
The substance is the long-ester testosterone that anchors most injectable ranges - an oil solution for intramuscular use, releasing over an extended period thanks to the heptanoate chain bound to the hormone. A higher concentration simply means less volume for the same quantity of active.
