I am currently getting ready to ramp up my production of .223 reloading for both training and SD. I am curious if it is worthwhile to separate cases by manufacturer. I get my casings from a local range, and generally get the following headstamps:

Win NT
WCC
Winchester
Lake City
R-P

If it makes any difference, I know that this is all once fired brass.

Is there any significant difference, such that I should prefer one over the others, or even bother separating out at all? If so, how would you rate the listed brass, from highest to lowest quality?

My shooting will be out of a AR-15 carbine, shooting probably no longer than 300 yards, and that would likely be stretching it for my general usage.

Thanks.