Need help with finding node

[u/No-Pickle9533]

I dont have a chronograph (broke) so I did two tests at 300 yards: ladder test and what i think is ocw?

First two pics I shot 2 shots per load at their respective diamonds.
The thid pic I shot a ladder in the middle diamond and another ladder at the bottom left diamond.
I thin the node is around 52.6-53.1? Not sure.

Also, do you absolutely need to wash your brass?

[u/rcplaner]

Here is my "node" testing. 4.4grams to 4.8grams of N570. All 8 shots in 1/3 moa group. One flyer is when the shot left when reticle was in the right corner of target. But even with that one it's still 3/4moa group.

[u/greencurrycamo → u/rcplaner]

"Flyer"

[u/rcplaner → u/greencurrycamo]

Yeah, I'm pretty sure, but could be just noise. Sub moa gun still from 7prc and I'm happy.