Re: How many pieces of brass...
Not much different. I start with a batch of 300 for each load, i.e. 300 for my 500/600 yard load and 300 for the 1000 yard load. I do the same for each caliber. I try to time it to reload the entire batch at the same time if possible. This doesn't always (in fact, seldom) work and it does get complicated when a two day match comes up and I have to change from say reload #4 to reload #5 in the middle of a match. I have many small boxes, two for each batch, labled with caliber, powder/bullet weight and reload number to help keep it straight! Good luck with the system you work out.