That's like finding a 9mm live round on the ground, leave it there ( well unless you have no other and zombie is on your a$$ ) best not shoot it,
could be RATHER HOT load.
H4895 with 77 gr tmk /lapua brass and cci primers 2790 fps out a 26 barrel "Suppressed".
Have used varget to and not sure I can tell any change in sd's or groups.
I got some 75 gr hornaday bullets I wanna try and someone I know was doing 3000 fps max out to 1000 yds and he stated he was successfull.
For my bolt 223 I use imr/h4895 and get sub moa results with 77 tmk/hpbt . Have used varget and not sure I can see much difference if any in my AO 223.
Now for my ar with 26’ barrel I prefer AR Comp.
Allthough varget is king in my 308.
100% right,
All though that one case that never delivers at max was My 6.5 creedmore absolutely loved about 8/10ths over max with 4350 and accurate to but after about 2/3 reloads brass bulged/donut'd so that's my 1 rare unicorn.
I backed it down and got close enough to live with it at 600yds.
Tough question and it depends,
either you get lucky and find the node in a few or you'll end up doing it all over again.
In answer to your question 5 per string and all of them on a chrono and node will show up.
Some guy use to tell me "cry once and buy once or by twice and cry twice" I just...
Just went down that rabbit hole with 147 jhp's and after a loooong time and many powders,
I got it and what a nice pistol round it is considering I have many thousands here.
Very accurate round with less rise.