Never chrono'd it! I find it all to easy to get bent out of shape about how fast my load is, so I took the proactive step of taking the battery out of my F1, putting it in it's drawer, working up a load for accuracy using the aforementioned OCW method and then just shooting.

I am moving on to a new tub of 133 on the next few weeks I should imagine, I could chrono it then if you like. Whenever I change propellant batch I always drop .5(ish) of a grain and work up again just in case anything changes.