All of my competition ammo is for pistol. My bulk rifle loads are for blasting. I too use all military once fired brass ... mostly LC.
I do some JC Garand matches but it's 200 yds. so I won't be pressuring you for your F Class "secret sauce"
I'd never tell anyway. If I did, the supposed 'informed' folks would have a coronary. lets just say I don't adhere to any published specifications concerning length, load or sizing and all my load workups are based on custom machined die sets (John Whidden), made specifically for each chamber.
I start at 200 yards for a coarse evaluation and then in out to 500 for a zero sight in from the bench. I shoot (pun intended) for a 3 out of 5 in the same hole at 500 consistently and that takes some pretty expensive rifles with match grade barrels and actions..... and then, there is the optics.
I shoot deer with a hand gun (S&W 44 long barreled revolver) but with 240 Sierra Sportsmasters in Starline brass with a recommended load of Lil Gun at the SAMMI specified length. Thats about it for my pistol shooting and most times I hunt with a tricked 308 lightweight bolt gun.
Don't believe I've ever just 'blasted' out rounds with no purpose other than making noise and getting a sore shoulder. I usually take just 10 loaded rounds on any hunt, here or far. It only takes one, possibly 2 to bring down an animal no matter what it is, deer, mulie, elk or moose.
All my 'firing' if you call it that is using the Erik Streckler method of determining bullet jump in a particular rifle using a mid range load of a particular powder and then after obtaining the best group of 5, fiddling with loads and trimming meplats to get the lowest BC and fastest MV, then chronographing and calculating drop charts, taking into account spin drift and barometric pressure as well as ambient temperature.
I gave you the very basics with no propellants, bullets, primers or seating depths. Thats all taboo.
You see, I'm of the school of 'one shot, one kill' no matter what the distance is. that distance however is based on caliber and skill. No 'Kentucky Windage' practiced in out group.
Anyway, I read along and get enjoyment from the thread and if I can like I did in the above couple posts, impart some knowledge about folks I've dealt with concerning components.