@redbob
From what I have discovered the Union army at Vicksburg had 47 batteries with 247 guns and the Confederates had 172 guns with 69 being siege weapons.*
Regards
David
Types of Cannon present during the siege
FIELD ARTILLERY
Smoothbores
6-pounder Gun
12-pounder gun (Napoleon) Gun-Howitzer
12-pounder Howitzer
24-pounder Howitzer
Rifles
10-pounder Parrott
3" Ordnance
20-pounder Parrott
SIEGE & GARRISON
Smoothbores
8" Howitzer
10" Mortar
12-pounder Gun
24-pounder Gun
Rifles
18-pounder Gun(Rifled) Confederate "Whistling Dick" Obsolete, rifled & banded
30-pounder Parrott
SEACOAST these guns capable of firing heated shot
Smoothbores
8" Columbiad
9" Dahlgren Confederate copy of Dahlgren design
10" Columbiad
11" Dahlgren
32-pounder Gun
42-pounder Gun
Rifles
6.4" Brooke
7" Brooke
7.5 Blakely Confederate "Widow Blakely" British 42-pounder, rifled & banded
100-pounder Parrott
24-pounderNAVAL
Smoothbores
8" Dahlgren
9" Dahlgren
11" Dahlgren
12-pounder Howitzer
24-pounder Howitzer
32-pounder Gun
64-pounder Gun
Rifles
30-pounder Parrott
42-pounder (Converted Smoothbore)
50-pounder Dahlgren
100-pounder Parrott
13" Mortar
*Staff Ride Handbook for The Vicksburg Campaign, December 1862-July 1863
https://www.armyupress.army.mil/Portals/7/educational-services/staff-rides/StaffRideHB_Vicksburg.pdf