Ball versus Commercial:
Ball, or a military designation, is loaded to a specific Overall Length, Bullet Weight and Ogive (shape) and powder burn rate that allows it to work in self loaders (gas operated, long and short recoil, etc). Ball often is made with thicker cases that hold less powder, but stand up better to the mechanical stresses that self loaders dish out.
When Ball crosses over to a commericial cartridge, you end up with issues that are unforeseen. A commercial cartridge may be overlength or use too slow a powder to work in a self loading military design. A Ball cartridge may generate higher pressures in a tight commercial target rifle or a short throated target bore.
In general, they will work, but as a general rule:
1. I will use Ball and Commercial interchangeably in sturdy bolt action or other strong, manually cycled actions, which tend to be overbuilt and rather loose in dimensions, AND are labeled for interchangeability.
2. I will only use the specified Ball in military (style) or other self loaders.
3. I will only use the Ball or Commercial round specifically called out on Target rifles.