I've been using generic PPU/Prvi-Partizan 55gr FMJBT at 100yd for training.
I use a brass catcher on the AR and the PPU brass is what I make most of my match loads from. The rifle as always as accurate as the rifle is, and at 100yd, the outcomes between using the 55gr FMJBT and my 75gr match loads are hardly any different at all.
I figure that when the shot is off at as close a distance as 100yd, the problem is more likely to be me, and less likely to be the equipment; and that's what I'm trying to seek out with my shooting discipline. There's match shooting and there's everything else. Trying to make it any more complex than that is simply overthinking the whole matter.
I have recently made up a batch of handloads using the PPU brass and bulk Hornady 55gr FMJBT's. I expect them to shoot better than the factory stuff, but I need to get out and shoot them to confirm that.
I don't figure prices, I just make the ammo and use it; costs will be costs, period.
At my age, my life needs to be as simple as I can make it. Overthinking is too easy to do; and really, it just gets in the way of getting out there and gittin' 'er done.
I see topics about trainer this, and practice that, and even about dry firing. I don't have training rifles, and I don't dry fire. I figure that if I want to hone my shooting skill, I need to get out and shoot. Nothing I do outside doing the 'real thing' is equal to doing the 'real thing'.
Trying to do apples when the object is to do oranges is just chasing the tail, IMHO.
Greg