OVERVIEW & SUMMARY I update the following information as I get results that are worth presenting. This is current as of December 13, 2017. Details are included in the thread if you are interested- where I can I'll include links to relevant posts/sections. My factory Savage 12FV in 223 is capable of 0.5 MOA precision with basic hand-loaded ammunition (junky PMC brass, Lee dies, and a poor powder choice). Here’s the detailed graph of my results over several groups of 5 shot rounds of hand-loaded ammunition- take a look at 23.2 grains, it’s under 0.5 MOA (note: ALL of these loads are under 1 MOA). Here's a summary of what I've learned about the chamber on my rifle. Use this information at your own risk however- you should verify each reading by measuring your own rifle. Finally, here's how I would prepare the loads today with the same materials (i.e. PMC brass). I don't recommend using PMC brass however (hopefully that's obvious), and I wouldn't use IMR4064 either. If you want to make a more informed selection, check out the 223 FAQ here- there is great information about brass, bullets, and various powders. In short, H4895, Varget, H335, or VV N133 for powders, and better brass (i.e. Lapua and Nosler) are good starts. DISCLAIMER: I am not, and have not been, compensated by Savage Arms or any manufacturer mentioned in this thread. I purchased all the materials and supplies that I discuss here, and have no external affiliations or relationships. The thoughts I present here are exclusively my own, and should be used at your own risk.