See Pictures Below
Everyone knows I love my AR-15's. You can tailor build them to fit any style or need.
The same holds true for .223 ammo but it is tricky to load. Biggest problem is the primer pocket. Most brass you pick up at the range is cheap usually Remington FC (Federal cartridge) or LC (Lake City) many re-loaders just throw them away. When the primer is crimped in place the pocket will have a sharp edge after you deprime. A close inspection of the primer seat often will often show a complete black ring, indicating the primer was not seated flush against the bottom of the pocket. I deprime all my brass first before a chemical wash and tumble in "Tuff Nutt" then I use a RCBS pocket tool to clean the primer pocket seat.
BUT THE Best trick is…. I use a Stanley Carpet cutter blade and hand chamfer the primer pocket approximately 1/32 to 1/16" at 60 degrees. This chamfer allows the primer to start straight and evenly seat on the bottom of the pocket floor. Look at the primer pocket after you have pressed the old primer out. It should have a three lug pattern of alternating black, (burned powder residue) and brass (bottom of the pocket protected by the primer case).
I recently sent 500 rounds of .223 to South Dakota with some friends to help decrease the prairie dog population.
I was told that they will never buy expensive Hornady Varmint loads again.
Their favorite load is:
55 grain Nosler Ballistic Tip Boat Tails
24.3 grains of IMR 8208 powder (consistent regardless of the temperature)
I only use CCI primers.
Thousands of reloads not one FTF.