Reloading .303 British : Powder type and projectiles weight

As I explained in my reply to Goosic, that's pretty much what i'm ding now.  trying to be more systematic in my loadings.

Yes, the scale is essential, I realised that, and that's what I rely on.

Personnally, I weigh each load manually with a trickler, and I saw drastic change in accuracy.  I don't have any press or powder measure.  I use the old fashioned lee loader and caliper....it's tedious and slow but having to go manually through each of them rounds helps me staying focused on what I'm doing...(and probably helps my mental health as well as it gives me the chance to bang a hammer on something for a good reason, hahaha).

What follows may sound like a stupid question but, apart from being the righ weight and consistent diameter, what do "match bullets" have more than the classic Hornady 174gn Round Nose??

Cheers

Philtno