Decrease the damage falloff of sniper rifle.

BE & NF Sniper rifle

FalloffStart 0->3000 FalloffEnd 2500->10000

The damage falloff of sniper rifle is unnecessarily low that sniper rifle has always been dealing minimal damage at its desired range.

This change would let sniper rifle deal 2~4 more damage at the usual range.

Before

Range 0 <=> Damage 60

Range 2500 <=> Damage 55

Range 5000 <=> Damage 55

Range 10000 <=> Damage 55

After

Range 0 <=> Damage 60

Range 2500 <=> Damage 60

Range 5000 <=> Damage 58(roughly)

Range 10000 <=> Damage 55