Wouldn't the second slug shot in that be unprocced? Unless I'm missing something, that's slightly weaker.

CD > 3 > QR + 2 > 3 > CD

CD: 230
3: 270
2 + ammo: 255
3: 270
CD: 230
Total: 1255

3 > R + 2 > 3 > 2 > 3

3: 270
2 + ammo: 255
3 + ammo: 295
2 + ammo (no proc): 125
3: 270
Total: 1215