I have a question that I should have asked before reloading 100 rounds. I bought 1000 rounds of 223 when I was stationed in NC back in 2013. I haven't ever reloaded any rounds, and these were my first ones. When i bought them, I was told they were deprimed, swaged, and resized. I have the RCBS AR T/C dies. I just primed, loaded with powder, and seated a round in them. They mic 2.234...They feed in my AR, when I manually run them in and out. If I pull bolt back, place round in barrel, then raise barrel towards ceiling, then round will fall out...I have 900 more to reload. Do I fire some of the 100 to make sure they cycle good? Do I continue seating rounds in the other 900 and not resize them? Throw away the 100...redo...and resize the other 900 before loading?...or If the 100 are good, then can I do the same with the other 900? I hope my question wasn't confusing...I just want to know where to go from here. Thanks for any comments and feedback.

Shoot the ones you loaded. Check the fired brass for any problems.
If none found,load the rest.

While I would first fire my loaded rounds. I'd bet you a that they were resized when they were deprimed.

Umm properly sized brass WILL fall out of the chamber. It's supposed to be smaller than the chamber.
The time to worry is when it DOES NOT fall out under it's own weight.

Especially with an unfamiliar rifle and or load I would shoot a few first to make sure everything works. Pulling bullets or reworking loads is a PITA.

Thanks for the replies. I realize they are supposed to fall out and is why I did the test and reported. I am not sure why, but since this is my first batch, I was just a bit nervous when I skipped the step of resizing. I just wanted some feedback, to ease my worries. I was actually also a bit nervous about firing the 100 rounds. I feel better about it now. I have a single stage RCBS, so as you know that one step is time consuming, when doing it. Thanks again for all replies.

Don't get hung up on the falling out thing; they may or may not. the test is shooting some before you make any more.

Chronographs are essential. Buy, borrow or steal one if you can.