Does a spinner hinder prop bite , i was thinking that the spinner does block part of the blade, and i was wondering if this would hinder performance ?

No

No.

Ken

another no

And adding a spinner to a "naked" prop is one of the first things designers did back in the golder era of aviation to improve speed and range. And it improved speed and range.

The power of the prop comed from the tips. As a matter of fact, it's said that a spinner can add RPMs by directing the airflow out toward the tips and away from the fuselage.

Couple of things to think about.
Common sense really.
1. the inner part of the prop is moving much slower through the air than the outer portion so is less effective anyway.
2. the inner portion of the prop has an engine/airplane sitting directly behind it so if anything a tapered spinner will help break the air in front of this relativly flat surface and actually help improve performance of the aircraft overall.

Still no.

Also the nice pointy spinner helps to clear women and kids outta the way when carrying those birds to the car

Actually, the speed of a prop does affect the efficiency of it. Generally speaking, slower is more efficient. And that applies all along the blade.

But in aerodynamics, it's not sound byte simple.