The reason I ask is that .336 may be too large a diameter, especially if your brass is part of a lot that is on the thin side. I was encouraged to buy the exact
same bushing when I first bought my .308 and .30-06 Redding dies many moons ago. Ended up being waaaaay too big and I had to place an irritated call to Sinclair to get the right one(s).
To determine the correct bushing, seat a bullet in your brass and measure the outside diameter of the "loaded" brass around the bullet. Then - and I'd recommend you check the following out for yourself as I'm just writing this from memory
....subtract .001" from that number and order/use that bushing. The directions for choosing the right size bushing are in the box that your die came in. They can also be found on Redding's and Sinclair's website. Before it is all said and done, you'll probably end up with a few bushings to account for differences in brass manufacturing tolerances, which can differ a surprising amount even from lot to lot.
I'm curious which size you'll end up using and just how far you'll venture into the OCD anal retentive reloading worm hole that this leads.
You might want to check out this great article on brass prep... One of the Many Great Articles from the Archives of Precision Shooting Magazine...