There are any factors that give a particular cartridge the potential to be more accurate than another. Every other factor being equal (we all know this isn' t possible) other than the bullets and cases used certain things have the potential to bake a bullet more accurate than another one.

Starting with the three calibers, not cartridges, listed the 7mm bullet usually has more potential to be more accurate than the others unless you get into some really specialized bullets and weights. Then the 30 moves ahead of the 7mm.

A short fat case has the potential to be more accurate than a longer skinnier case.

A sub sonic bullet is potentially more accurate than a super sonic bullet.

A cartridge that head spaces off of the shoulder instead of a belt or rim is potentially more accurate than the other two.

Certain shoulder angles are more accurate than others. I believe it is somewhere between 35* and 40*? I can' t remember what angle is considered to be the most efficient.


Of course we all know that there other things that go into a bullet being accurate other than the case and bullet itself like the gun, powder used, uniformity of the cases, primers used, etc.....etc....