Table:
text: Washington Redskins draft history
1950s
1956 Draft
Round Pick Overall Name_ Position_ College
16 9 190 Wells Gray G Wisconsin
17 10 203 Eagle Day QB Mississippi
18 9 214 Jim Pyburn E Auburn
19 10 227 Ray Lemek OT Notre Dame
20 9 238 Vince Gonzalez RB Louisiana State
21 10 251 Howard Schnellenberger E Kentucky
22 9 262 George Nicula OT Notre Dame
23 10 275 Don St. John RB Xavier [w ]
24 9 286 Johnny Tatum C Texas
25 10 299 Franklin Brooks G Georgia Tech
26 9 310 Dave Burnham RB Wheaton
27 10 323 Royce Flippin RB Princeton
28 9 334 Billy Hicks RB Alabama
29 10 347 Pat Bisceglia G Notre Dame
30 8 357 Buck Mystrom G Michigan State

Question: What is the average number of rounds for Billy Hicks who had a total of more than 310 for the Washington Redskins draft history 1956-1950?