Two separate groups

[JFrank]

Meaning what caliber is known to do this?

Lots of them, my thoughts are load related.
24.7 under 80 gr Berger with a mag primer could be a touch too hot in a 223 Remington. But without knowing the caliber it’s just a hunch.

 

[Madchase]

Scope. I would never bet 100% on anything but the same thing happened to me and it was the scope. Mine was a Sightron lll 10x50x60.

 

[M-61]

Lots of them, my thoughts are load related.
24.7 under 80 gr Berger with a mag primer could be a touch too hot in a 223 Remington. But without knowing the caliber it’s just a hunch.

I thought he was shooting the exact same load which arbitrarily changed POI after a 3 shot group. Am I wrong with this interpretation?
If not, I have never seen the exact same load arbitrarily change 3 shot groups unless a scope, rings, mount,parallax, or something else was wrong.
Never saw 3 shot groups just suddenly jump into another 3 shot group and inch or may away with the exact same load. Have I seen shots jump all over the target to to a load that is unsuited? Sure.
Then maybe my interpretation of the post was wrong.

 

[J_idaho]

Tell everyone your setup. Shooting off bench?prone bipod. If shouldering rifle right hand shooter without good shoulder placement causes left impacts. As mentioned parallax can cause this. Barrel touching stock can cause shifts. Scope mounts moving. Overheated barrel usually causes more dispersion. I would assume wind, shoulder or parallax. I wouldn’t stress about it. Just keep practicing and eventually you’ll start to see what is causing it. There’s allot more going on when shooting then most people understand and with more practice eventually you will see patterns. Just like slow wind causes problems a light recoiling gun still moves under recoil. It only takes a few thousands of an inch of movement before bullet exit to cause a shift.