Bought a black widow MAIII with narrow arrow shelf.  Does this narrow shelf have impact on the arrow spine to be using. Bow is 55# at my 29 inch draw length. Using 29 1/2 inch 2216's now.
Going to try some 2020's  next week. Will try some 2117's when I find a few.
Anyone have any advice or information?
Thanks in advance;
Bob

I guess it's still cut 3/16" past center isn't it? if it is it should not be any different from the other widows, your shooting style may make some difference.  I have several Black Widows the newer bow shelves are cut(notched) to allow better feather clearance

give the boys a call in nixa. they are the best to answer B.W ?

The narrow shelf on the older recurves won't affect arrow spine at all; the only advantage the newer models have with the wider shelf is that it allows for more building-out of the strike plate, should you wish to get some low-spined arrows flying better.

I have a question for you - is your draw length 29" from the string to the front of the bow or inside of grip (deepest point + 1 3/4"). I am 6 feet tall and everyone else must be 6'5" or bigger. When I used to shoot a recurve I eventually got to 27 3/4 to front of bow (I must not be "average").
Besides all that 2018 worked for me at 55lbs.
bowmaker.net for spine charts

Draw length is 29 inches to back of bow.
Bow is cut 3/16 inch.
I am also 6 ft. tall and have a 29 inch draw length and I add 1/2 to 1 inch to arrow  for clearance.
I think the 2216's are part of the trouble; I've shot them for years from 64# howatt hunter and also 2219.
I'll try the 2020's and some 2117's and see if that makes a difference.

Thanks for the help to everyone.
Bob

Yup, they may be a tad stiff with 125 grain head. You could up point weight or as ya said try a 2020. Shawn