In all the testing done over the years, no one has yet to prove whether right of left wing feathers are better for right or You can shoot either.
We can get left wingfeathers more readily than right wing. Left wing feathers are available in more colors, and they are cheaper. The case for leftwing is growing. However, if you do some testing on your own and you decide that a particular wing seems to function best for you,use it. Have faith in your own testing and results.