Arrow spine on a cut to center modern RD DF long bow

[Huntschool]

OK....  So, the question is ..  On a cut to center modern RD LB, shooting off the shelf with about a .124 strike plate thickness can a higher/lower then normal spine shaft be used.  I would like to shoot 100 gr. points or close to that number. I know there are determining factors such as release (mine is really good with between 1 and 2 fps difference between releases checked on a chrono).

I am trying to get the fastest speed I can get with a 29" draw  with a 29.5"  arrow out of a 38# +/- bow. This is for 3D with field points only.

Thanks in advance.

[McDave]

Moved to powwow.