280ai Ladder

[JD Jones]

First off I did this at 200 yards. I understand that is really not ideal at all but I couldn't get out to shoot 600+ anytime soon so I did the best I could.

The test: 2 strings of fire round robin 200 yards 56.5-61 grains rl26 loaded 20 thou off in .5 grain increments. Shot 2-3, cooled/marked target. I've got an idea of where I will go next but curious what others might interpret / do with the data I DO have from the target?

.

 

[Mark37082]

I'm struggling with trying to interpret this. Did you chrono the shots? I guess the horizontal spread is throwing me off. What is your take away from this session?

 

[Beluebow]

I'm gonna guess I'm not seeing it.....For me the target is a hot mess, it's big and it's wide. How was conditions?

 

[JD Jones]

I purposely dialed windage left after string 1(edit: I didn't want to have the impacts overlaying string 1 =why I dialed windage). Towards end of string 1 winds started to pickup and by end of string 2 it was pretty gusty. I marked the charge and (r1) for the first 10 and (r2) for next 10.

I did not chrono this test. I have already found pressure in a previous test and the intent was to identify vertical dispersion node(s). My thought from the target is 58 grains and play with seating

 

[JD Jones]

I fear though, that I need to do the test over at 600+ to highlight vertical dispersion better

 

[Beluebow]

For me personally I'm not seeing 58gr as the go to load. And here's why 57.5-58-58.5 is probably MOA... roughly 2" looking at both ladders....which could be deceiving. I'm not seeing anything that's really wanting to repeat and stack on each other within a half a grain either side?

As the shooter you probably have a much better understanding of conditions and what was going on during your string of fire. Sometimes that skews the perspective from the outside looking in.

 

[Dmagna]

Did you use a chrono ?

 

[JD Jones]

For me personally I'm not seeing 58gr as the go to load. And here's why 57.5-58-58.5 is probably MOA... roughly 2" looking at both ladders....which could be deceiving. I'm not seeing anything that's really wanting to repeat and stack on each other within a half a grain either side?

As the shooter you probably have a much better understanding of conditions and what was going on during your string of fire. Sometimes that skews the perspective from the outside looking in.

Fair enough. I felt good about every shot but 1 . Called it bad but on target it was right in line with the previous impact far as vertical is concerned.

I'll likely scrap the test and do this at 600+ in a few weeks. I was hopeful I could get some usable data at 200.

 

[8andbait]

Inconclusive

 

[lancetkenyon]

If that is only at 200, I see nothing worth pursuing.
Since you don't say what bullet, I would be switching bullets or powder.

 

[JD Jones]

If that is only at 200, I see nothing worth pursuing.
Since you don't say what bullet, I would be switching bullets or powder.

Reloader 26 and Berger 168s.
Shot from a CA ridgeline fft

 

[lancetkenyon]

What other bullets do you have? I have seen the 168s be really finicky in some rifles.

 

[JD Jones]

I've got the 140s and I have the cx150s from Hornady. I'd like to get ahold of some accubonds but the reality of that is fading fast to work up a load in time for October

 

[KsKevin]

You could do OCW test instead if getting to 600yds is a barrier