Update: I didn't realize how much was lost into the cotton, I've rinsed them a few times - but if I'm reusing them I'll cook them so kill the bacteria.
This is my personal method for shooting opana IR's only. (I'm working on a trick with the ER's - but it's on hold since I'm out at the moment)
These are the ingredients of the pill 5mg or 10mg oxymorphone HCL - keep in mind, both pills contain dyes within which will color your shot but I'm not going to bother listing them.
Lactose monohydrate - IS water soluble, melting point is around 214 degrees Celsius
Magnesium stearate a.k.a. octadecanoic acid or magnesium salt - melts at 88 deg Celsius, IS NOT water soluble
Pregelatinized starch - will cause the mixture to thicken some in COLD WATER - therefore use hot water (just not over 88 deg celcius - see above)
I start with two small containers of water (I use shot glasses) with only filled with about 9/10's of the rig's capacity - the cup with the hot water is cup A, the cup without the water initally is cup B.
I crush as finely as possible the instant release medication and place it into cup A, while mixing - the water should be colored by the dye. I drop in one filter, and slightly fill my rig with a tiny amount of water. I press down onto the filter without the rig attached and push out the water, then begin suction into the rig. After you've pulled some into the rig, place another NEW filter into Cup B. As you pull up from the filter in cup A, slowly push out a small amount of fluid as you pull the rig out until you're out of the water & disconnected from the filter just in case there is still negative vacuum in your rig so you don't pull in crap on the way out. Place the needless rig against the new filter in cup b, then push out your solution so it passes through the filter and into cup B. If you need to repeat the process, try to use a clean filter for cup B each time you push the fluid through to prevent crap from the existing filter escaping and contaminating your shot even more.
After you've drained the most of the fluid from cup A, and placed it into cup B - add another NEW filter into cup B after removing the old one, then apply the needless rig and pull the fluid into the rig, and again slowly release a tiny amount as you pull out in case a negative vacuum exists in the rig.
This should result in a slightly colored (Magnesium stearate free) shot - with little dye and starch (note the starch is a thicking agent, and isn't good for your blood stream, hense the super excessive filtering process) in the shot. Keep in mind, the lactose should be in the shot (might be important in your diabetic, but if you're shooting it - I doubt you care)
Attach the rig, clear out any remaining air - and blast off.
Please remember oxymorphone is about 10x the strength IV'd than then taken orally. I didn't heed this warning at first and started at 10mg - which was fine since I had taken oral doses of 90mg IR before, then moved up to 20mg - which probably would have killed me in my sleep if I hadn't had a CPAP.
If you're not already IV'ing - DO NOT START... snort oxymorphone instead - it lasts much longer than a shot, but isn't as intense.
I might clean this thread up later, if I feel the need to create a step 1 through step 10 (etc) guide.