3/10 second or less

[BktBallRef]

Originally posted by Ron Pilo
I "HEARD" that there was some actual testing that took place with players from all levels of play and it was determined that no one got get a "TRY" off in less than .3 seconds.

So that's where the rule came from.

Again, that's what I "HEARD"

There may have been tests conducted . But the initial NBA rule change came as a result of the Bulls-Knicks game.

Originally posted by crew
green
you are very close to the nba rules interp. in the nba with
.3 on the game clock a player may catch and immediatly shoot with a slight dip.
during the nbdl meetings before the season officials were given extensive guidelines on shots taken with less than 1 sec on the clock. the pro and college timing is slightly different.

Yes, it is slightly different.

From EXPIRATION OF TIME

NO LESS THAN :00.3 must expire on the game clock when a player secures possession of an inbounds pass and then attempts a field goal. If less than :00.3 expires in such a situation, the timer will be instructed to deduct AT LEAST :00.3 from the game clock. If less than :00.3 remain on the game clock when this situation occurs, the period is over, and the field goal attempt will be disallowed immediately whether successful or unsuccessful.

So essentially, the NBA rule is :00.2 whereas the NF is :00.3.