Here is the weight of all the shells I made from smallest to largest caliber (on planes)
Following the name will be a plane that primarily uses that weapon

DSKZ-5mm Light Machine gun

PZL-5 Siren
Bullet-1915 AP-T
Weight 1kg

Bullet-1919 HEFI-T
Weight 1.5kg

Bullet-1943 APCBC
Weight 1.6kg

DSKZ-7.6mm Medium Machine gun

Corb MK-2
Bullet-1918 APC-T
Weight 1.7kg

Bullet-1935 HEFI-T
Weight 1.76kg

Bullet-1920 APCBC
Weight 2.01kg

DSKZ-12.4mm Heavy Machine gun

PZL-24
Bullet-1923 APCBC-T
Weight 2.1kg

Bullet-1942 HEFI-T
Weight 2.35kg

Bullet-1931 APCHE-T
Weight 2.61kg

M-4 0.50cal Machine gun (12.7mm)

P-42 Tsunami
Bullet M13 APC-T
Weight 3.5kg

Bullet M16 HEFI-T
Weight 3.87kg

Bullet M15E2-M15E3 APBC-T
Weight 3.9kg

Bullet M15-M15E1 APCBC
Weight 3.98kg

Bullet M14-M14E5 APBCHE-T
Weight 4.12kg

15mm M3 Series multirole cannon

P-55 Meteor
M25 APHE
Weight 5.2kg

M28 APCHE
Weight 5.4kg

M31 APBCHE
Weight 5.6kg

M35 APCBCHE
Weight 5.8kg

M35E1 APCBCHE-T
Weight 5.9kg

DSKZ-20mm Light Minigun

PZL-153 A
Shell-1968 APHE
Weight 5.98kg

Shell-1972 APCHE-T
Weight 6.2kg

Shell-1978 APBCHE-T
Weight 6.8kg

GRE-35 20mm

Eurocopter Delta (G)
Flgr.35 APC-T
Weight 6.87kg

Flgr.45 APHE-T
Weight 6.89kg

Flgr.42 APCHE-T
Weight 7.1kg

20mm LVMG

Mirage 6000
Coque antichar lourde. 51 APHE
Weight 7.11kg

Coque antichar lourde. 55 APBCHE-T
Weight 7.13kg

Coque antichar lourde. 58 HEAT-T
Weight 7.21kg

Coque antichar lourde. 45 HEFI-T
Weight 7.28kg

M-200 Decimator Minigun (24.8mm)

F-120
M84 APFSDS
Weight 7.3kg

M86 APHEFI-T
Weight 7.56kg

M89 APCBCHE-T
Weight 8.1kg

CT-56 25mm

Chengdu J-48
Type-32 AP-T
Weight 8.1kg

Type-45 APCBC-T
Weight 8.21kg

Type-41 HEFI-T
Weight 8.34kg

Type-30 APCBCHE
Weight 8.54kg

DSKZ-25mm Medium Minigun

PZL-114D
Shell-1971 APCHE-T
Weight 8.6kg

Shell-1979 APBCHE-T
Weight 8.7kg

Shell-1982 APBCHEFI-T
Weight 8.9kg

Shell-1995 APCBCHEFI-T
Weight 9.5kg

DSKZ-30mm Heavy Minigun

PZL-153 A + B
Shell-1985 APBCHE-T
Weight 9.5kg

Shell-1979 APBCHEFI-T
Weight 9.8kg

Shell-1991 APCBCHE-T
Weight 9.9kg

GAU-13/A Heavy rotary cannon (38mm)

A-35 Scorpion
M24 AP
Weight 10kg

M24E1 APC-T
Weight 11kg

M24E2 APBC
Weight 13.6kg

M25 APBCHE-T
Weight 14.9kg

50mm Recoilless Rifle

XAC-1010 Spookey V
M79 HESH
Weight 15kg

M79E1 HESH-AP
Weight 15.9kg

M79E2 APHESH
Weight 18kg

57mm Revolving Rocket Gun

XA-34 Rocketeer
M57 Rocket-HE
Weight 23kg

M58 Rocket-AP
Weight 31.8kg

M57E2 Rocket-HEAT
Weight 35.1kg

M59 Rocket-APCHE
Weight 40.1kg

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I will be updating this and using it to find my vehicles burst mass