In my experience it completely varies rifle to rifle. That said, most of my 91/30s do quite well with Czech silver tip.
Silver tip is light ball, and cooks along a few hundred FPS faster than the heavy ball, which was more common circa WWII. At 100m, I haven't noticed a difference, really, between most of the light and heavy ball ammo.
Past 100m, the heavy ball starts to win out. It also tends to follow the adjustments of the rear tangent sights better. I spent a lot of time going back and forth between Bulgarian silver tip and Chinese heavy ball last year in my Mosins and SVT, and found with all of them the heavy ball "tracked" with the rear tangent sights a lot better all the way out to 400m (the furthest I tested).
Accuracy for both was fine up to 200m, but at 300m and 400m, the heavy ball started to shine.
Your mileage WILL vary. These are old rifles, with varying degrees of wear in the rifling, and all kinds of differences that will affect accuracy (crown condition, stock bedding/warp, etc. etc. )
If you ask around, it shouldn't be too hard to get 20 or 40 rounds each of a number of different types (seems like everyone buy by the crate, so tends to have enough to spot/sell a 20 round pack), and you can go from there to figure out what works best in your rifle.
Cheers - enjoy the Mosin journey. One of the best bolt action deals going. Good rifles, accurate enough, indestructible, fires a round that puts the fear of God into all within hearing distance of the muzzle blast.