I'm gonna toss this out... orange and red, my eyes see very blurry targets, no precise edge definition etc... my eyes allow me to shoot better with buff or white background, a black diamond with white center diamond.
Y'all are doing great, but the bright targets might not be helping.
Everyones eyes are different. The brighter orange with the black center helps my piss poor eyesight.
I use solid black painted steel gongs at the house, no reference points except the target itself, makes leveling and centering those Sharps rifle iron sights that much tougher, same/same for scoped rifles, the object itself is your mark, bracketing it center, then striking center mass with reticle or iron sights is job number one, my thinking on that is I've never seen an animal with a target dot on itself ; ]
The little redfield targets with 1" squares come in handy for setting a zero on set and forget standard type hunting rifles.
