The reason why you chop amphetamine (or anything else you're intending to snort) is creating more surface. Huh? Imagine a cube, side lenght 1cm (r 1 inch, 1 mile or 1 mesogalactic shitlength, just one something). It's total surface is 1x1cm²+1x1cm²+1x1cm²+1x1cm²+1x1cm²+1x1cm² = 6cm². (six square planes, length*length). Now chop it into 8 cubes of 0.5cm each. Now you have 8 cubes each 0.5*0.5*6cm² = 8cm². Same weight, more surface. Speed is absorbed by contact with membranes. More contact means faster and because of the limited solubility of amphetamine more complete absorbtion. So, the finer, the better. Practically, you dont want to hack for three days on each line, so find a reasonable compromise.
Well, probably as fine as it feel comfortable doing so.
Most of my customers or people that i know swallow it to dose it in general, probably not pleasant to be snorting.
Have you tried a warm/hot plate before chopping it up?
If you don't chop it fine enough, more will be absorbed through your stomach and bypass your nostrils and the effects would kick in a bit later. If it is paste you want to chop it up very finely to allow every bit of solvent to evaporate. No need to insufflate that..
This! Also, if it is wet dont even try to insufflate, first you need to dry well till all solvents evaporate and after that you can procced to chop.
From my experience, i recommend to do a 3x times acetone wash and left it dry very well till have a fluffy consistent shape, it will easy for you to snort and less chopping.
You need coffee filters and 2 empty crystal glasses or jars. In one recipient you put your speed and around 80ml or 100ml of acetone, you start sporing with a spoon and after all product get dissolved in the recipient, you procced to the second recipient. Take the second recipient, you put your coffee filter and procced to fill the coffee filter with the speed that we dissolve in the first recipient. It will filter all the byproducts and cuts (Caffeine and some solvents), at the top of your filter you will see the clean stuff and at the bottom of the recipient are the dirty stuff. Hope you understand everything, if not, feel free to ask me!
If you look on amazon, just search "powder grinder snuff", that's what I use and it's absolutely perfect, effortless, and you'll save your time as well.