In standard rifle shooting positions, the steadiest position is the ________ position.

The prone position is recognized as the steadiest shooting position because it lowers the shooter's center of gravity and maximizes contact with the ground. Being fully supported allows for a greater level of stability, which is crucial for accuracy in rifle shooting. This position provides a solid platform through the entire body, allowing the shooter to control recoil more effectively and maintain precise aim.

In contrast, the standing position offers the least stability due to the body's upright posture, which can lead to more movement and difficulty in steadying the rifle. The sitting position is more stable than standing but does not provide the same level of support as the prone position. Finally, the kneeling position offers a compromise between stability and mobility, but it still doesn't achieve the level of steadiness that the prone position allows. Therefore, the prone position is the optimal choice for steady shooting.