25g is heaven, shouldn't hurt to bad if at all. When you say pain do you mean during the injection or after? Pain after for a few days is from the prop in the sust. Try your thigh, see 2Thicks injection site for good directions. Mid outer section of the quad basicly. The prop will hurt your thigh more than your ass but it's easier to inject in the quad if you don't have help.

Good luck

First, I use a 22 gauge and it is larger than the 25. Two, inject into the outer thigh, but be sure to press the needle slowly to the depth you want to get. Draw
the needle back to aspirate, no blood, press to inject.

Now, the real pain you may feel it the proprinate portion of the oil will cause irritation to the site for a few days. All of the proprinate and phenylproprinate will
release the test to your blood stream by the fourth day, the test isocaprote will be released in 10 days, and then the last is test decanoate will be release on the third or fourth week. They don't hurt like the first two.

Good luck, if you follow this you will find it useful knowledge.