I'm with Hopalong on this one. You have to try it (just like any load development) and see what your gun likes. (Darn guns.....they are a lot like women....try this, try that....sometimes you get it right the first time, sometimes you gotta spend a lot of time and money to get it right! You know....high maintenance ones and low maintenance ones!!!).
My .223 Contender (Factory T\C bull barrel) loves the Lee Collett die. I do the sizing on a single stage press. In fact, I do (if you read the instructions to the die....YES...sometimes I actually do read instructions!!!) what they describe and "double size" it. I size the brass, turn it about 1\4 of a turn, and then size it again. Then after I size all of my brass, I trim it, then complete the reloading on a Hornady LNL progressive....doing all of the rest of the steps except the sizing (of course). I usually load about 500 .223 rounds at once.
Now, my Encore .243 prefers full length sizing. I have a lee collett for the .243, but the Encore shoots much tighter groups using full length sized brass. Go figure? Hey...I don't argue with it, I just size it, load it, and shoot tiny groups with it.
So, you just gotta try it and see what happens.
Dave