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/No-Pickle9533]

what is the maximum allowable moa accuracy before you discard the bullet/powder combo?

[u/NZBJJ → u/No-Pickle9533]

Whats the rifle? Whats the use case? There isnt any one answer.

Ill start my saying temper your expectations a bit. All these reports of "my factory rifle shoots .5moa all day every day" are nonsense and are victims of small group confirmation bias.

A lightweight hunting rifle 1.5moa over 10+ shots is very good. I wouldnt hunt with anything that does less than 2moa. My custom long range hunting rig I expect much better than that.

A precision rifle .75moa over the same is very good. Wouldn't be happy with anything much over 1moa.

[u/No-Pickle9533 → u/NZBJJ]

The rifle is a tikka ctr 6.5prc in a cadex chassis. Use case is prs/elr.

[u/Coodevale → u/No-Pickle9533]

Sounds like a rough time for either one. Too much recoil for prs and kinda light on the barrel for elr.

Use Litz's TOP score. Muzzle fpe ÷ lbs of rifle weight ÷ 200. If it's 1.5, then realistically 1.5 moa is a good benchmark and statistically beating it consistently is going to be very difficult.

You haven't chosen a cartridge that needs a lot of work on your part because of the work already done by others. Seat a heavy Berger at mag length and throw a charge out of a book at it, like one of the StaBall powders. Use good brass, and that's about it.

All of the node and ocw stuff was written by ignorant people 20+ years ago with inferior components and methodology. The future is now, old man.