Your horizontal spread appears to be about 1/2”, which is outstanding. Your ammo suits your gun.

If you can shoot 1/2” horizontal, you can do the same vertically. Your trigger work does not impact vertical spread. So what does?

It is often uneven vertical pressure on the barrel, even through the stock. I suspect that is caused here by shooting from your bipod. Atlas is a top of the line piece of gear. But if it is mounted way out on your fore end, and your barrel is not 100% free floated, that can definitely cause such vertical stringing with differences in “loading” forward pressure on your bipod.

That pre-loading will also negatively impact your Natural Point of Aim (NPOA). To load a bipod you have to muscle forward into it.

Another cause of vertical stringing can be breath control. The old directive to take breath, let it out halfway, then squeeze the trigger is not very accurate. What is halfway? Can you duplicate 1/2 way each time? Most of us cannot. So, let your breath all the way out—bottom out. Easier to duplicate. You will have 3-4 seconds to operate the trigger before oxygen deprivation sets in and you start shaking.

So, try shooting from a bag positioned about 1/2 way under your fore end. Get NPOA, breathe and watch your scope move, usually from 1 o’clock (empty lungs) to 7 o’clock (full, natural breath). Adjust your physical position so the gun stops moving, empty lungs, on center target. Do this three times exactly the same before shooting each time. Adjust your position if you’re not perfect three times in a row. Fourth time with empty lungs, press the trigger straight to the rear.

I’ll bet you can reduce that group to a wall hanger of which you can be even more proud. Good luck.