lol I wasted my time (about dmg+ per lv)

I have a bunch of Lv.1 RARE items, and a few of EPIC items.
I wondered when the damage of EPIC and RARE becomes equal.
so I made a excel datesheets... but I figure out it is totally crap.

I assumed that the damages would increase regularly every level-ups.
so I simply calculated by the following formula.
"Damage increment per Lv ups = ( Lv.50 dmg - Lv.1 dmg ) / 49"
but when I input my item values I noticed that I was wrong.
It's not 'regular' lol

 

As far as I can tell, the numbers are 'regular' as you say. The issue is that the weapon's damage shown in game at all levels are rounded so we're trying to find specific values based on rounded inputs.

I've previously made a chart for all the items that you can copy to your Google drive but note that it isn't updated for the recent balance changes (shouldn't affect your berta though):

https://docs.google.com/spreadsheets/d/1YBXS0LPaEQwDUyXe4xJ-05DQV72_m68JZNKAkUOOVdg/copy?usp=sharing

 

Www.battlebayitems.com shows you the comparisons between different rarity tiers of that helps

 

at first, I thought it was a 'round' issue too.
but the numbers differ too much.
I cant tell this is a round issue.

ex) for example my big berta.(RARE, Crew bonus 10 + 51% and Perk bonus + 15%)
*actual
Lv.40 dmg : 1268 / Lv.41 dmg :1289 / MAX dmg(Lv.50) : 1517
*at the result of simulation,
lv.40 dmg : 1287.9 / Lv.41 dmg : 1310.8 / MAX dmg(Lv.50) : 1517.24

 

I believe you're right. It's been a while since I put much thought into item scaling but looking at some of the damage values I had written down before, there seems to be a difference between the damage gained during a level up and the damage gained during an evolution. I'll definitely consider looking more into this to figure it out.