I have a tutorial here on loading the Hornet. Die set up is critical as, can be, primer selection. I tried various pistol primers and found them to be inconsistent compared to rifle primers. Problem is the primer is much higher
percentage of the power produced in that tiny case. Many years ago Remington engineer and well known benchrest shooter developed the Remington 6 1/2 primer. It is lower in power and very consistent. The best there is in my opinion. Next comes the Fed. After that all the rest. My experience only and not worth arguing about.
Bullets and the CZ 527. For me there is one. The Horn 35 gr. Why? Diameter is .2235". What is the bore of the 527? .2235"! I do not know if that is a happy coincidence or planned. Many of the older Euro Hornets had a .223 bore while all post WWII American rifles had a .224" bore. Of the 5 or 7 bullets tried the happy little 35 gr Horn worked best for me.
Powder? Lil Gun. Higher velocity at low pressure! How the heck did they do that? I have no idea. This also where cases come in because for me they matter. Remington will hold 13.0 of Lil Gun while Winchester will only hold 12.5 without compressing.
So my "go to" load for accuracy and everything else? Rem case. 12.5 gr Lil Gun (just because I hate balancing the full case of powder and trying not to spill). 13.0 shoots as well but I'll take 12.5. Rem 6 1/2 primer DON'T try to turn the Hornet into a .223. Love it for what it is.
Read tutorial for die set up info:
https://www.rimfirecentral.com/forum...ighlight=7%2F8