fale bottom

just getting started in all grain brewing. i am using a ten gallon round cooler for my mash tun with a false bottom i purchased from northern brewer. my problem is that after i crushed my grain to industry standard i had a lot of grain go thru the screen and into my kettle. any advice would be great.
Cheers!

Vorlauf baby, Vorlauf!

http://www.homebrewtalk.com/wiki/index.php/Vorlauf
http://www.craftbeer.com/pages/beer-studies/beer-dictionary-glossary-of-terms/

+1 for what Beer Tigger says.

...oh, and go slowly. I use the same set up and try to target a 45 minute run off - after recirculating to get clear wort.

...and a decent refractomoter would be a good tool to have handy so the runnings won't go below 1.010 SG - anything below this will likely start extracting harsh tannins. I'll check my runnings after they start looking real clear to see where the gravity is and when it starts getting close to 1.010, I'm done.

Here's a link to the one I got: http://www.amazon.com/XiTech-0-32-Brix-ATC-Refractometer/dp/B004Q800RK

In case the link doesn't work properly; it's a XiTech 0-32% Brix ATC Refractometer - entering this in Google will get you there.