Well, you say you have half of a normal line you would snort, do you get high from a whole line? Buzzed? A glow? Tweaked out? Whatever it makes I you feel cut it in half, look up the nasal bio for a line, for example if its 75% , and plugging rectally is 99-100%, then plug half the line, you should feel just as high as snorting a whole line...it's all mathematics and legit information, I can imagine how small your line is,as I had a small tiny line last night, use 1.75-2.0ml water mixed with ur line and suck up with oral syringe and plug,be sure not to squirt with a lot of pressure ,u don't want it getting near any feces. What works great for me is sticking the oral syringe 1/2inch in rectum and squirt with enough pressure for it to be 3 inches deep into your rectum to minimize any fecex if unsure if ur Pipes are clogged. I MAY BE WRONG BUT SHOOTING METH HAS A 100% bio HOWEVER I HEARD U NEED MUCH MORE METH TO GET DESIRED EFFECTS