I'm getting close to being able to reload my first rounds. After reading through my reloading handbook (lymens 49th) I feel confident and comfortable enough to start. However I have some VERY basic questions that may be on the stupid side but I'd rather be safe than sorry. I am only reloading 223 right now so all questions are for that caliber. 1: in the manual all the loads they have call for a Remington case, am I limited to only using that case or will any brass case in the same caliber work, assuming it has been trimmed, ect. And will a 556 case work for 223. To my understanding the case itself isn't any different. 2: do I need to use a primer that is the same brand as the case I'm using or are they cross compatible. 3: in the Manual for 55 grain loads they call for a 55 grain Sierra jacketed SPT. Can I use any 55 grain bullet, even if it is not a soft point or do I have to use that bullet. Still trying to figure everything out before I even try to start so thank you in advance for the help!