I have xxl hands and am tall.
I get my full hand on the grip of many full size models. All compacts have a partial hand grip, with the pinky finger only being partially on the grip or mostly off the grip, sometimes impeding any magazine changes. Subcompacts usually have the whole pinky off the grip with the ring finger either fully on or partially off, sometimes magazine changes can be impeded.
My fingers can pretty much touch my palm on subcompacts, within roughly 1/2 inch of touching palm on compacts, and maybe 3/4 of an inch from touching palm on full size pistols.
Is it an issue to not have all the fingers on the grip?
Are there any techniques to use for a grip that is smaller than the hand and fingers are off the grip?
Would I be better off carrying and shooting a full size (G17/45, P226, etc.) to get a full grip?