ok, well i have a TM Silent Hunter rest. i also have the little arrow keeper made by golden key that slides on the rest to hold the arrow..it then flips away when the bow is drawn. the problem is my vanes are 5" and the brace height on my buckmaster 2000 is short enough that the tips of the vanes do not let the keeper far enough back on the arrow to effectivly hold it on the rest...if i switch to 4" vanes the problem would be solved. if i do this, what will happen to my arrow flight. will the 4" provided enough stabity. right now the 5"ers are fletched straight with a slight right twist. everything is shooting good now so i dont want to mess things up. i and shooting about 60#, 29" and xx75 2216's and 90 grain broadhead/field points.....thanks in adavance for any help you can give me

as with most archery equipment you use what feels good most of my customers use 4 inch vanes when i make arrows the newer vanes are a little stiffer and do the job but i am seing a few guys who like quick spin vanes ill probably start testing those in the spring im kind of slow testing new stuff when my stuff is still working my son uses 3 inch in his youth bow its set at 50 lbs they do the job

http://www.broadheadtests.com/FEATURES.html
scroll down to the middle of the page. These may be your answer. I will probably be using them next season.

Unless you're using a big wide cut fixed head (which at your listed 90 grains I doubt), 4" should provide plenty of control.

Here is another vote for the Bohning blazer vanes. They fly great.

i have a magazine that says people are using 2 inch vanes for hunting and provide excellent arrow flight

Just use some Bohning Blazer vanes
they put plenty of drag on the arrow to keep it in the center of what you are aiming at.

Right now, your FOC is running about 7%, well below anything I'd consider good for a hunting arrow. It's much more unstable than it needs to be. 2216's are a pretty heavy shaft, one of my favorites in fact, but the shaft weight means they do not match up well with light points and heavy fletching. 5" vanes are a LOT of weight on the tail end.

Here's what I'd recommend doing. Switch to a 125 gn point and 4" vanes to raise your FOC to about 10%. Doing that, you'll maintain almost the exact same total arrow weight. If you aren't totally addicted to vanes, think about switching to 100 gn tips and 4" feathers to improve FOC even more AND lighten your arrows for better speed and trajectory.

Nick Snook Of Turbonock also has the T4 nock coming out on the market. It replaces the regular nock on your arrows and allows you to use smaller vanes. I plan on trying them out with some of the Bohning mini Blazers.

Another vote for Bohning Blazers. Never really thought they would work as well as they do on my ACCs. Not sure if they'd work as well with a heavier aluminum arrow though. They are only 5 grains each, so they'd help improve your FOC as Arthur mentioned.