I ran your setup through Stu Miller's archery spine calculator and I think the best point weight for a 30", 2117 at 50# @ 28" with your 28" draw length is going to be somewhere between 210-225 grains. The calculator will give you a tunable arrow, but my info is based on your bow being cut 1/8" past center. Since you didn't provide that info, this is a guess on my part. If the 2117s don't work, and you want a heavy arrow, then a 30", 2018 should work with a point weight somewhere between 145-160 grains, but again, I'm guessing your bow is cut 1/8" past center.

BTW, 3 Rivers Archery sells 5 grain brass weight washers you can put behind your field points to get the odd weight like 215 grains, etc. They come in 5/16" and 11/32" diameter. Do yourself a favor and get the 11/32" even if you go with a 2018 arrow. The 5/16" are wider than the 11/32".

http://heilakka.com/stumiller/

http://www.3riversarchery.com/product.asp?i=5208X

I use the calculator to tune my two recurve bows you see in my signature. The calculator is very good to get a tunable arrow, but all the info in the 14 boxes has to be "correct" for it to work.