I think it was washing up to at least 0.85 from a gram with ammonia and a good chef, so no, not pure, but not bad for UK. It was wayyy too much. The biggest id do before was ~250mg and that also was too much.
Oh yeah and I'm pretty sure
@nznity has shot up like half grams of peruvian local stuff

i guess tolerance plays a role. Id probably done at least 30-50 x ~100mg before i regrettably stepped up to doing more.
About 100mg of coke in with an IV hit of k can be really nice, but i actually prefer to IM the k and then smoke a pipe just before/as the IM starts to hit. I will add that amphet and k in the same barrel is wayyy better than coke and k together. The coke doesnt hit fast enough to keep up with k and you still black out, but then come round feeling nice and chinged, whereas phet pretty much overtakes the k and then makes the experience actually rememberable rather than a rush into a black out like it normally is with IV k over ~300mg (ymmv)