Personally I do not pickup range brass, but lots of folks do. If you are going to use range brass - seperate all head stamps and develop loads for each one. There is a surprising amount of difference between manufactures of brass. Clean your brass throughly and give them a careful inspection. Look for slpit necks, obvious dents, that can not be shot out, or a ring (or thinning) right above the web. Once they past that muster, full length size and look for loose primer pockets when seating the primer and toss those as well. You absolutely must seperate head stamps if you are pushing the upper limit in pressure. If you load light, then likely you would not have to sepate head stamps, however be aware that your zero will more than likely change from one shot to the next due to differing case capacities. These are the reasons I do not use range brass. The money saved is just not worth the hassle + even if you do sepate your head stamps, you more than likey have to change your zero from one to the next, besides all the load development it takes. Even a semi - auto takes a certain amount of pressure to cycle the action reliably, so it is important to load consistantly.