I have a five gallon bucket of Federal .223/5.56 brass and after cleaning and prepping the brass I find out I have over sized loose primer pockets on 50% of these cases. Rather than seat the primers and find out the primer pockets are too loose I bought a pocket gauge. But one end of the gauge is .175 and the other end is .172, so I bought a .1745 pin gauge and decided to call this primer pocket maxim. The .175 NO-GO gauge end told me nothing, so I took it down to .174 and I was loosing a lot of cases so I ordered the .1745 pin gauge. So I have four questions. 1. Do any of you use pin gauges to check your primer pockets? 2. What is your largets acceptable primer pocker diameter? 3. Who makes the largest diameter small rifle primers? 4. Is soft Federal factory loaded brass even worth reloading if the primer pockets are stretched after the first firing? I put a lot of work into these cases and I would like to used them but I do not want any high pressure gas leakage etching the bolt face or have any primers fall out. This is for loading AR15 rifles and I do not want the primers falling out and jamming the trigger group or damaging the bolt face. Normally military ammunition has crimped primers and on a over gassed AR15 the bolt can move to the rear while the cartridge is still gripping the chamber walls. And if your primer pockets are not tight you can pop a primer.