No problem on the confusion man. And I totally understand what you are saying.
But I have also met people that injected sub q and will never do it again lol me being one of those people. Also read a few people on here saying the pip is horrible. I tried it once and was the worse mistake I ever made. Dont think its a theory I believe it depends on the person.
Most guys injecting with slin pins are not injecting subcutaneously. They are lean enough to where the 1/2" pin is long enough to penetrate the muscle. But I will agree that pip varies from person to person.