Something I suggest you do when first reloading a new caliber. Seat a bullet into a case that has no primer or powder. Then cycle it in your handgun/rifle 3 or so times. Just to make sure it chambers and extracts properly. It also gives you the opportunity to make sure the bullet is not setting into the case. I have seen a few people having problems chambering .223 rounds they have loaded, because the brass was not re-sized correctly.
Never is a bit strong. I've had some brass that just did not like seating flat base bullets even with a chamfer (fwiw I didn't think to mention chamfering since I assumed it had already been done as part of case prep, mea culpa for assuming).
For the OP, as I said in my original reply, as long as you are not crumpling the case neck, it is not needed. I concede that I should have made it more clear that it's not a common issue. The other posters are absolutely correct, the case mouth should be chamfered as part of case prep. I do it slightly for boattail bullets and more for flat base. I'm editing my posts to reflect this.
I just loaded my first batch of .223 rounds as well. I chamfered all my cases, all it takes is a couple of turns with a hand chamfer. Using boat tail bullets I do not have to hold onto the bullets when seating them, and there is no need for a crimp.
I recommend the Lyman case prep center for doing big quantities like you have. I just did 2k .223 and it make case prep a breeze! It chamfers,deburs, pocket cleans and even takes out the military crimps if needed and cabelas is selling them for $99. Best money I spent.
You can use the hand tool but if you have the extra cash its a great investment.
I dont want this to sound like I am being mean but you are brand new to reloading so please be carefull with the advice you throw out so freely. I have seen you post alot of advice for fellow reloaders about topics that are brand new to you as well.
I will say that with good neck tension you can get away with no crimp for the lesser recoil rounds but it is my standard to lightly crimp any round that goes hunting or goes into a magazine. Plain and simple bullets get knocked around in mags and stuff happens.
USP please dont take this the wrong way but I have loaded thousands upon thousands of rounds well 5k of .223 and 3.5k of .45acp in the last 4 weeks. I still have reservations about giving advice on certain topics.
I learned from loading manuals and books written by people that know alot more about reloading than I surely ever will. Those same books are available for anyone to read.
Sgreen3 where are you shooting in S Indiana?
On the crimp you should remember if you are doing load development and find a combo that you like w/o a crimp and decide to take that same load hunting where you would normally crimp. That same load could change your POA or not have an effect at all.
I like to stick with the same everytime so there is never a doubt. For my own shooting I change enough from lot to lot on my ammo trying diffent things out. It would be easy to get confused even with proper notes.