The prop ester causes pain. This is well known, even wiki has that it causes pain, but they claim the cause is short ester, but that’s not true, acetate ester is shorter and causes almost zero pain.
Prop and PhenylProp both cause pain, even more pain than TNE. It’s also true that prop is known to initiate more systemic inflammation known as test flu.
There’s only one way to lessen the pain and that’s to cut it 1:1 with sterile oil. Buy some sterile grapeseed oil on ebay, pick up a 50ml bottle for cheap. Buy some sterile 5, 10, or 20ml vials and fill them with your dilution.
I’m not against using prop, but for the life of me I have no idea why more guys aren’t adopting the acetate ester which is one of the best test esters out there for guys that want to do frequent injections without estrogen sides.
Hell I love acetate so much I have enough raw of that ester to last 40 years.