Peashooter: A+. It deals good damage but is outranked by some other weapons.
Spread: A. Its damage per shot is 1.24, which means the ceiling function of its DPS (damage per shot) is a small 2.
Chaser: S. It deals 2.85 damage, which means the ceiling function of Chaser's DPS is 3. With the added high fire rate, it's pretty good.
Lobber: B. Although it deals good DPS (11.6) with a ceiling of 12, it has a pretty low rate of fire.
Charge: S+. If you charge it to full, it will deal a massive 46 damage. It makes even the hardest fights easy.
Roundabout: S. It has a high fire rate and a DPS of 8.5, which means the ceiling function of its DPS is 9.
Crackshot: S+. It has a DPS of 10.56 (ceil 10.56 = 11), and combined with its split damage being 6.7 (ceil 6.7 = 7), it's quite goooood.
Converge: A. Its DPS is 2.67, which means the ceiling function of its DPS is also 3. However, it's not outranked by Chaser.
Twist-Up: B. Although the ceiling function of its DPS is also 3, it's outranked by Chaser and Converge because its DPS is 2.33 (about 7/3), less than Converge's 8/3 or 2.67 and Chaser's 57/20 or 2.85.