2.5 - 3g of dried subs is a good/heavy trip?
i've tripped WAY hard on 4 small mushrooms which i'd say is more like 1 dried gram. sub's have a tendancy to vary wildly in potency, so its difficult to work out dosage... basically unless you standardise a batch by powdering them then you can't work out how hard you are going to trip.
i think a fairly strong trip would be more like 2g dried... 2.5 - 3 grams is heading into EXTREME territory... most people would have a good time on 1.5g.
Sub's, like most woodloving mushrooms are very potent... it's generally accepted that they're twice as potent as cubensis, and most people would regard an eighth (3.5g) of cubensis as a good fairly strong trip.
the dose curve for mushrooms is very steep... 1-2 grams of cubensis would have someone barely tripping. double that dose, and things start getting wild!