Tolerance issues.

I am running into quite honestly appalling tolerance issues with my RR. I will print parts that are 300x300x300 and they will measure as close as possible to 300mm³ as can be. But when it comes to printing parts that fit together, printing holes for pins, it leave a lot to be desired.

e.g. my ender 2 i could go down to a 0.05mm tolerance. need a 2.5mm pin to fit in a hole? make the hole 2.55mm in cad and it will fit.

But i am at a point now with my RR that even a 0.3mm tolerance isn't cutting it. and it seems to be getting worse the more i use it.

has anyone else faced issues with terrible +/- tolerances, or are my expectations too great from a previously better machine?
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