I use same system as Tayloce1.
And when I find something to build from I donload a twenty or even more, proof type loads... I dont usually shoot less than 5 rnds to see if theres any interest in data.
However the component shortage has put a stranglehold on testing new bullets for old guns...
I only use hunting type bullets for my Hunting style rifles, they are put together to hit as close to where crosshairs were, when trigger breaks.. Standing or leaned up against a tree, or laying prone, use of logs..