My quest for accuracy

[JW]

Idaho
Reading your post shows you are having a lot of fun (and maybe a little agitation lol) loading and trying different bullet/powder combinations
I know what you are going through--been there

My suggestion to you is to take one powder and one bullet and work with that combo
Get the load worked out and then play with the bullet length (COL) If it doesn't work, move to another bullet or powder
I have noticed that with the 223, one tenth of a grain difference in powder charge will make a difference on the group
I would at least go in 1/2 grain increments with the varget loads you mentioned above and then break it down smaller around the best groups

Typically,there will be a a low powder charge that shoots well and a high powder charge that also shoots well
It all really depends on what you want to do & how far you want to take it in your quest for accuracy
An old timer told me years ago: "There is no end to it" He is right and I have to remind myself often LOL
I hope this helps, have fun & be safe
Jack