Don't know or care about all the fancy names, just pointing out I tried the no shots fired tall target test and without a vise is was a no go for me. I do everthing solo,so I just find what works with what I have. As for the string and lug nut, sure that'd work but I don't drive a prius and I have no problem throwing stuff in the bed. I typically carry way too much stuff on my outings.
I guess you have to start somewhere but if you don't trust your ammo and shooting ability at 100 yds then I see no reason for a person wasting time doing a tall target test. For me it was an experiment after shooting at 900 yards at a 18" target and hitting repadiitly , then moving out to 1104 yds and taking 18 shots to get on target and difficulty after that. Lots of factors, hot barrel, wrong baro pressure from guessing, scope maxed out and holding +2 mil, learning to read wind, lack of skill yada yada.
Basically I setup using that big level, shot 3 at zero, 3 at +5 mils(18") and 3 at +10 mils (36") with my reticle following my plumb line. I had just bought and mounted a new scope and cheap rail bubble level that didn't seem to jive with my scope mounting level. So at +10 mills with reticle plumb I was avg say 1/2" right, then moving the rifle so the faulty bubble level was level, I was 2-5/8" left with that one shot. Worked down to +5 mils then zero and groups acted like they should,or close enough for my shooting therapy needs. I do admit I had slightly different +5 mil groups because zero and up I believe I shot in 1 string, them let it cool for my 4th +10 mil shot and worked down letting it cool again before zero.
Firing bullets while "testing" works for me since I'm simple minded and need verifiable proof for things to click. I now fully understand how a few degrees of canting (5-10*) the rifle at a high elevation adjustment at 100 yds make such a POI change, that at long distance that's a massive miss like I was experincing, and also I believe I can plug the 1/2" right at +10 mils @ my 100yd zero into my shooter ballistic app and that will be caculated with my correction of bullet twist and scope adjustment. I'm sure I did a crummy job explaining my theory but it works for me
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