so i'm just wondering unlike the OP i have a REALLY high opiate tolerance. 200-300 mg's of oxy per day. Any suggestions on a recomended starting dose?
That's definitely a decent tolerance.

Try 2mg, wait an hour, if you even feel the slightest bit nauseous, dont take any more. If you dont feel nauseous, take another 2mg. The second time you do it, if you ended up taking 4mg the first time, start with 4mg, wait an hour, and take 2mg more. (again, only if you dont feel the slightest bit nauseous)
d3Xo-fan says to start with 4-6mg. While he may be right, I'd still start lower. Taking too much Sub is a HORRIBLE experience. I was given an 8mg pill my first time, had no idea what it was, and popped the whole thing. (Yes I know how stupid this is

) I was the sickest I have ever been for three days straight. I threw up every thirty minutes for the first 48 hours. It's obviously up to you how much you start at but again, I'd start lower and work my way up.