To understand how bulletdrop works in the game, we need to know the stats that modify the travel time and curvature.

Travel:
This one gives how fast a bullet moves, and its calculated as Travel*50=m/s.
For example, in the case of the sabertooth, which has a travel time of 10, we can do 10*50= 500m/s.

Bullet speed:
The product of Travel * 50 is what we will call Bullet speed.
Once we have the bullet speed in m/s, we can easily calculate how long would it take to reach its destination depending on the range by dividing the range we want by the bullet speed. For example, at 250m we just do (250m) / (500 m/s) = 0.5 s
or at 200m we do (200m) / (500 m/s) = 0.4 s

Step:
This one doesn't seem to modify ballistics (if it does please let me know), but travel*step gives the actual range of the gun.

Drop:
This one affects the curvature of the gun. Higher values of drop causes the bullet to curve faster, thats why bows despite having slow arrow speeds have less drop, since their drop is 0.001 instead of the usual 0.002

Remember a lot of guns have the same bulletdrops.

For example, the drops for sabertooth are also the drops for Snayperskya, Maplestrike, Zubeknakov, Augewehr, and nearly all assault rifles.

the drops for grizzly are also the same drops for timberwolf, and the drops for ekho are the same for hecate.

Just keep in mind that using a suppressor will increase the drop by 10%, and that using a muzzle will decrease it.

Here I'll be adding the drops for different weapons, scopes and scope qualities (because the reticle does change from scope off to scope ultra).

I won't add guns with the same drop and travel time, since the same markings should work (for example, Timberwolf and Grizzly).

also keep in mind that drop for suppressor and muzzle are different, as muzzle decreases drop and suppressor increases it. Barrel doesn't change drop.

Grizzly -16x scope -scope OFF
Travel: 12.5
Bullet speed: 625 m/s
Drop: 0.002
Damage: 99 (base damage)
HS damage: 108.9 (1 hit to kill)
HS Helmet damage: 92.5 (2 hits to kill)
Fire rate: 2.38 RPS
Range: 300 m

Sabertooth -16x Scope -Scope OFF -Suppressor
Travel: 10
Bullet speed: 500 m/s
Drop: 0.002
Damage: 60 (base damage)
HS damage: 66 (2 hits to kill)
HS helmet damage: 56.1 (2 hits to kill)
Since travel and drop are the same as maplestrike, these drops also work for most assault rifles (heartbreaker, zubeknakov, maplestrike, snayperskya, augewehr, nightraider,fusilaut, etc).
Sabertooth -16x Scope -Scope Ultra -Suppressor
Sabertooth/ARs -7x scope -Scope OFF -Muzzle

Here I'll be adding the drops for different weapons and scope qualities for the 16x scope.

keep in mind that drop for suppressor and muzzle are different, as muzzle decreases drop and suppressor increases it. Barrel doesn't change drop.

Grizzly -16x scope -scope OFF
Travel: 12.5
Bullet speed: 625 m/s
Drop: 0.002
Damage: 99 (base damage)
HS damage: 108.9 (1 hit to kill)
HS Helmet damage: 92.5 (2 hits to kill)
Fire rate: 2.38 RPS
Range: 300 m
Timberwolf -16x scope -scope OFF
Travel: 12.5
Bullet speed: 625 m/s
Drop: 0.002
Damage: 99 (base damage)
HS damage: 108.9 (1 hit to kill)
HS Helmet damage: 92.5 (2 hits to kill)
Fire rate: 0.98039 RPS
Range: 300 m

Sabertooth -16x Scope -Scope OFF -Suppressor
Travel: 10
Bullet speed: 500 m/s
Drop: 0.002
Damage: 60 (base damage)
HS damage: 66 (2 hits to kill)
HS helmet damage: 56.1 (2 hits to kill)
Since travel and drop are the same as maplestrike, these drops also work for most assault rifles (heartbreaker, zubeknakov, maplestrike, snayperskya, augewehr, nightraider,fusilaut, etc).
Sabertooth -16x Scope -Scope Ultra -Suppressor

Hawkhound, pine rifle, AR and DMR - 16x scope -Scope OFF -No barrel attachment

Grizzly -8x scope -scope OFF
Travel: 12.5
Bullet speed: 625 m/s
Drop: 0.002
Damage: 99 (base damage)
HS damage: 108.9 (1 hit to kill)
HS Helmet damage: 92.5 (2 hits to kill)
Fire rate: 2.38 RPS
Range: 300 m
Timberwolf -8x scope -scope OFF
Travel: 12.5
Bullet speed: 625 m/s
Drop: 0.002
Damage: 99 (base damage)
HS damage: 108.9 (1 hit to kill)
HS Helmet damage: 92.5 (2 hits to kill)
Fire rate: 0.98039 RPS
Range: 300 m