Differing shoulder pressures more likely the answer to the vertical stringing.

[Allen One1]

"Differing shoulder pressures more likely the answer to the vertical stringing. "

Walkalong posted this in another thread. I'm not understanding what differing shoulder pressure is referring to. Can anyone help me out?
Thanks,

 

[Blue68f100]

He's referring to shoulder position. If the position of the shoulder is set back the brass has to expands out fill the chamber before max pressure is reached. With a properly placed shoulder this is minimized, so it obtains pressure quickly. We are talking about micro/nano seconds here.

 

[Walkalong]

Test it out at the range. Fire a couple of shots with hard shoulder pressure, then a couple with light shoulder pressure. The ones with light shoulder pressure will print higher. Consistent shoulder pressure/recoil control of the rifle is critical to vertical stringing.

Dunno about the pressure thing.

 

[Allen One1]

Human shoulder pressure! I was assuming cartridge shoulder pressure. Now I get it.
Thanks,

 

[Walkalong]

Human shoulder pressure! I was assuming cartridge shoulder pressure. Now I get it.
Thanks,

Heh, yea, I guess I could have worded that better.

 

[243winxb]

Stock design- The flat surfaces that ride on the bags , under recoil , should help vertical. Like this internet photo.

 

[Walkalong]

Yes, that stock design does when shooting off of a front rest and rear bag.

Regular tapered stocks not so much. Can really can hurt yourself vertically if you are not consistent.

 

[flashhole]

Tag - I've seen technique matters with vertical stringing. It's hard to correct.