I can use around 8 oz max pellet hops without problems for 10 gallons. Over that I should have a dose of whole hops in there to help keep some of the spooge above the false bottom. I can use over a pound of whole hops with no worries.
Right now the boil kettle has a Sabco false bottom, SS screens with round holes. The mash uses a pico-brewing false bottom, slotted copper.