Not sure why you would think coke that would require a .5 g "big sniff fest" to get you high would produce the desired buzz at .025 g. Lets get real. Good coke will give you the desired rush at a dose of .1 - .25 g's. A good way to measure your dosage, aside from weighing each shot is to premix all the coke you plan to do in a session. I would mix a 8ball (3.5 g's) with 5 mils. (500 units) of water or saline. This will yield 7 mils. of solution. When you then draw it up, every 10 units is .05 grams. A .1 shot is 20 units, a .25 shot is 50 units. You get the idea. I have no idea what "pure blue liquid like pasty gel" referred to above is, exactly, but my connect gets fire that dissolves quickly in cold water with no residue. It's consistent, expensive and pure.
If you're prone to addiction anyway, you might heed the advice above. If your curious about what the big deal is, get a sitter, follow my advice above, and search some of my old posts for more good advice on IV coke.
Be safe, have fun.
FC