If no trickler, I would avoid extruded powders all together unless you're throwing lower charges. You will still lack consistent charges but at least you shouldn't be at risk of throwing dangerous overloads.
Yeah, powder weights vary much more from powder throw to powder throw using extruded powders. I haven't load much 223 for a long time....but do use extruded powders for 30.06, .270, .338 and both .243 & 6mm Rem. I try to throw just a bit under the desired load then use a trickler to bring the load up to the exact desired load. One thing....those powder weights vary due to how the extruded powder grains happen to fall into the measure and jam up against one another. A little shake performed similarly each time can often make your throws somewhat more consistent. Likewise, when the cases are about full, you can often pick up the case, shake it lightly (covering the mouth, of course, so powder doesn't fly out) and tap lightly on the bench a few times and the volume of the charge will usually reduce somewhat. This has, on occassion, allowed me to take what may have been a lightly compressed load and seat a bullet with no compression. That said, I can't speak to how well this would work with your loads in a small .223 case...but it's worth a try. I know a lot of guys swear by certain compressed load and I know they tend to good accuracy with their loads. I, however, have always wondered about compressed loads and whether grains get crushed or whatever. If I were to load on a progressive loader, I would load a bit below max and use a non-extruded powder (either Ball or flake) that would throw more accurately and that would mostly fill the case but not needing to be compressed.
, but that aside - 
