Standard Deviation.

[wwg1wga]

I'm developing a load (7mm SAUM) that has been showing an SD of < 2 and ES < 5 Yet the rounds are not tracking, Do I need to change seating depth next? I am limited by Magazine :-(

Brass has now been neck turned for 1/thousand tension as well. -- Thoughts?

 

[pell1203]

Maybe you could provide a little more information.

What do you mean by the rounds not tracking?

 

[bjay]

Once im getting consistent SD/ES reading with same charge..i work with seating depth..if its hybrids i start .015 to .160

 

[wwg1wga]

POI is > 1"

 

[Milo 2.5]

POI is > 1"

Is the stringing vertical or left to right?

 

[bjay]

Is the stringing vertical or left to right?

How do u fix either verti or left to right

 

[Milo 2.5]

How do u fix either verti or left to right

I fix vertical with charge weight, horizontal with seat depth if initial development.

 

[bjay]

I fix vertical with charge weight, horizontal with seat depth if initial development.

Just wanted to confirm our method is similar..ty mate

 

[wwg1wga]

Thank you all. Will be trying this. The only limit is Magazine depth, Should have used a long action.. :-(

This is the gun I am working with..

7mm SAUM