A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA AB
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 Effectiveness Avg. Shots Stopped
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 Don't expect to kill someone through that armor 0 Pointless 20+ Can't penetrate in any reasonable amount of hits
4
 1
It's Possible, But...
13 to 20
 Typically doesn't penetrate at all for a large number of hits, or starts with a very low chance and barely increases
5
 2
Magdump Only
 9 to 13 Has a very low or no penetration chance intially and very slowly gains chance
6
7
 That armor will stop quite a few of your bullets 3
Slightly Effective
 5 to 9 Has a low penetration chance intially and slowly gains chance, or quickly damages armor until it penetrates
8
 4 Effective 3 to 5 Starts with a low-medium penetration chance but quickly increases
9
10
 Has no problems against that armor 5 Very Effective 1 to 3 Penetrates a large percent of the time intially, often quickly going to >90%
11
 6
Basically Ignores
 <1 Initially penetrates >80% of the time
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*Note this is just a comparison guideline on what you should use and not always exactly representative of it's true #of shots performance against armor
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Damage - This is how much health damage a bullet does
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Pen Value - A value used to determine how well a bullet penetrates armor and how much durability damage it does to armor, the higher the better.
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Armor Damage % - A modifier used in calculating durability damage, the higher the better.
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Frag. Chance - The chance a bullet will fragment, splitting into pieces on hit and essentially dealing 50% extra damage.
*Note that fragmentation chance is currently bugged, and chances will be lower than their chance implies, and any ammo with less than 20 pen value will be completely unable to fragment.
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A more detailed explaination on how these values affect damage and armor penetration can be found here:
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https://tarkovaftermidnight.wordpress.com/2018/02/26/armor-and-penetration/
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Ammo Chart is updated for 0.12.2
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Recent Updates:
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12/27/2019: New 7.62 x 51 and 54r rounds, minor .366 TKM changes
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12/9/2019: A bunch of changes across most rifle calibers
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Armor Effectiveness vs.
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 Ammo Type
Damage
Pen Value
Armor Damage %
 Frag. Chance* Class 1
Class 2
Class 3
 Class 4 Class 5
Class 6
 Notes
Armor effectiveness uses per shot, meaning X pellets hitting the target on every shot. Because each pellet does a minimum of 1 durability damage to armor, it becomes effective at breaking down armor and eventually penetrating.
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 12 Gauge Shot 5.25mm Buckshot 34 1 15 0% 3 3 3 3 3 3 8 Pellets
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 8.5mm Buckshot "Magnum" 44 2 26 0% 3 3 3 3 3 3 8 Pellets
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 6.5mm Buckshot "Express" 29 3 26 0% 3 3 3 3 3 3 9 Pellets
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 7mm Buckshot 32 3 26 0% 3 3 3 3 3 3 8 Pellets
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 (2) Flechette 19 28 26 0% 6 6 6 5 5 4
8 Darts, the armor damage is pretty high and with 8 total darts, it destroys armor very quickly
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 12 Gauge Slugs RIP Slug 235 0 11 100% 0 0 0 0 0 0
Because it has less than 20 pen, even though it has a 100% fragment chance, it can't fragment
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 Superformance HP Slug 190 2 12 39% 0 0 0 0 0 0
^ This is true of all ammo under 20 pen
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 Grizzly 40 Slug 170 12 48 12% 6 2 0 0 0 0
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 HP Copper Sabot Premier 160 13 46 38% 6 2 0 0 0 0
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 Led Slug 147 15 45 20% 6 4 1 0 0 0
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 Dual Sabot Slug 75 17 65 10% 6 5 2 0 0 0 2 Slugs
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 Slug "Poleva-3" 130 17 40 20% 6 5 1 0 0 0
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 FTX Custom Lite Slug 153 18 50 10% 6 5 1 0 0 0
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 Slug "Poleva-6u" 140 20 50 15% 6 6 2 0 0 0
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 Shell With .50 BMG (Tracer) 177 23 57 5% 6 6 3 1 0 0
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 (1) AP 20 Slug 164 32 65 3% 6 6 6 3 1 0
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 20 Gauge (DO NOT USE) 5.6mm Buckshot 25 1 12 0% 3 3 3 3 3 3 8 Pellets
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 6.2mm Buckshot 21 2 13 0% 3 3 3 3 3 3 8 Pellets
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 7.5mm Buckshot 24 3 14 0% 3 3 3 3 3 3 8 Pellets
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 7.3mm Buckshot 22 3 13 0% 3 3 3 3 3 3 9 Pellets
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 Devastator Slug 188 4 13 100% 1 0 0 0 0 0
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 Slug "Poleva-3" 110 14 35 20% 6 2 0 0 0 0
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 Star Slug 134 16 42 10% 6 5 1 0 0 0
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 Slug "Poleva-6u" 120 17 40 15% 6 5 1 0 0 0
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 9x18mm SP8 67 1 2 60% 0 0 0 0 0 0
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 (1) SP7 - Flesh Round 77 2 5 2% 0 0 0 0 0 0
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 PSV 69 3 5 40% 0 0 0 0 0 0
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 P gzh 50 5 16 25% 2 0 0 0 0 0
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 PSO gzh 54 5 13 35% 2 0 0 0 0 0
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 PS gs PPO 55 6 16 25% 3 0 0 0 0 0
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 PRS gs 58 6 16 30% 3 0 0 0 0 0
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 PPE gzh 61 7 15 35% 4 0 0 0 0 0
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 PPT gzh 59 8 22 17% 5 1 0 0 0 0
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 PST gzh 50 12 26 20% 6 1 0 0 0 0
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 RG028 gzh 65 13 26 2% 6 2 0 0 0 0
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 BZT gzh 55 16 28 17% 6 4 1 0 0 0
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 PBM 44 22 30 16% 6 6 2 0 0 0
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 (2) PMM 56 25 33 17% 6 6 4 1 0 0
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 7.62x25mm LRNPC 66 5 27 35% 3 0 0 0 0 0
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 LRN 64 6 28 35% 3 0 0 0 0 0
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 FMJ43 60 8 29 25% 5 0 0 0 0 0
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 akbs 58 9 32 25% 5 1 0 0 0 0
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 P Gl 58 10 32 25% 6 1 0 0 0 0
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 T Gzh (Tracer) 60 12 34 17% 6 1 0 0 0 0
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 (1) Pst gzh 50 24 36 20% 6 6 3 1 0 0
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 9x19mm RIP 102 2 11 100% 0 0 0 0 0 0
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 PSO gzh 56 10 32 25% 6 1 0 0 0 0
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 Luger CCI 70 10 38 25% 6 2 0 0 0 0
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 Green Tracer 58 14 33 15% 6 3 1 0 0 0
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 (2) PST gzh 54 18 33 15% 6 5 1 0 0 0
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 (1) AP 6.3 52 25 48 5% 6 6 4 2 0 0
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 9x21mm sp12 75 14 63 35% 6 2 0 0 0 0
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 sp11 70 16 44 30% 6 3 0 0 0 0
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 sp10 49 32 46 20% 6 6 5 3 1 1
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 (1) sp13 62 36 47 20% 6 6 6 4 1 1
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 5.7x28 mm r37f 98 8 7 100% 4 0 0 0 0 0
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 ss198lf 74 10 15 80% 6 1 0 0 0 0
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 r37x 81 11 14 70% 6 1 0 0 0 0
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 ss197sr 62 20 22 50% 6 6 2 0 0 0
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 (2) ss190 57 32 43 20% 6 6 6 3 1 1
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 (2) l191 (Tracer) 58 33 41 20% 6 6 6 3 1 1
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 (1) sb193 54 35 37 20% 6 6 6 4 1 1
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 4.6x30 mm Action SX 65 13 39 50% 6 2 1 0 0 0
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 FMJ SX 43 30 41 20% 6 6 6 3 1 1
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 (2) Subsonic SX 41 34 46 20% 6 6 6 4 3 1
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 (1) AP SX 35 47 46 10% 6 6 6 6 5 4
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 9x39mm (2) sp5 68 35 52 20% 6 6 6 5 3 2
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 (1) sp6 58 43 60 10% 6 6 6 6 5 4
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 SPP 67 45 56 20% 6 6 6 6 5 4
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 BP 60 50 68 10% 6 6 6 6 6 5
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 .366 Geksa 80 14 38 45% 6 3 1 0 0 0
107
 FMJ 73 20 36 25% 6 6 1 0 0 0
108
 (1) EKO 65 30 38 20% 6 6 6 2 0 0
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 5.45x39 mm SP 68 11 34 45% 6 1 0 0 0 0
110
 HP 74 11 20 35% 6 1 0 0 0 0
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 PRS 60 14 29 30% 6 2 0 0 0 0
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 US 65 15 34 10% 6 3 0 0 0 0
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 FMJ 54 20 30 25% 6 5 1 0 0 0
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 T (Tracer) 57 20 38 16% 6 6 1 0 0 0
115
 PS 50 25 35 40% 6 6 4 1 0 0
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 PP 46 30 32 17% 6 6 6 3 1 0
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 (2) BP 48 32 41 16% 6 6 6 4 2 0
118
 (2) BT (Tracer) 44 37 49 16% 6 6 6 5 3 1
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 (1) BS 40 51 57 17% 6 6 6 6 6 5
120
 (1) 7n39 37 62 60 2% 6 6 6 6 6 6
121
 5.56x45 mm Warmage 85 3 14 90% 1 0 0 0 0 0
122
 55_HP 75 9 22 70% 5 0 0 0 0 0
123
 MK_255_Mod_0 60 17 32 3% 6 4 1 0 0 0
124
 M856 (Tracer) 55 23 34 33% 6 6 3 1 0 0
125
 FMJ 52 24 33 50% 6 6 4 1 0 0
126
 M855 49 26 37 40% 6 6 4 2 1 0
127
 (1) M856A1 (Tracer) 51 37 52 33% 6 6 6 5 3 1
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 (2) M855A1 44 40 52 34% 6 6 6 6 4 2
129
 (1) M995 41 53 58 32% 6 6 6 6 6 5
130
 7.62x39 mm HP 83 15 35 26% 6 4 1 0 0 0
131
 US 56 29 42 8% 6 6 5 3 1 0
132
 T45M (Tracer) 62 31 46 12% 6 6 6 3 2 1
133
 (2) PS - IF NO BP 54 34 52 25% 6 6 6 4 3 1
134
 (1) BP 58 47 63 12% 6 6 6 6 5 4
135
 7.62x51 mm Ultra Nosler 102 15 20 70% 6 4 0 0 0 0
136
 BPZ FMJ 88 31 33 25% 6 6 6 2 0 0
137
 TPZ SP 60 36 40 20% 6 6 6 5 2 0
138
 (1) M80 80 41 66 17% 6 6 6 6 4 3
139
 (1) M62 (Tracer) 79 54 75 14% 6 6 6 6 6 5
140
 M61 70 68 83 13% 6 6 6 6 6 6
141
 7.62x54R T-46M (Tracer) 82 41 83 18% 6 6 6 6 4 3
142
 (2) LPS_Gzh 81 42 78 18% 6 6 6 6 4 3
143
 (1) 7N1 86 45 84 8% 6 6 6 6 5 4
144
 7BT1 (Tracer) 78 59 87 8% 6 6 6 6 6 6
145
 SNB 75 62 87 8% 6 6 6 6 6 6
146
 7n37 72 70 88 8% 6 6 6 6 6 6
147
 12.7x55 mm ps12a 165 10 22 70% 6 0 0 0 0 0
148
 ps12 115 28 60 30% 6 6 5 2 1 0
149
 (1) ps12b 102 46 57 30% 6 6 6 6 5 4
150
 Mounted Weapons 30mm Grenade 199 1 95 0% 0 0 0 0 0 0
This has an explosion radius like grenades which does most (all) of the damage
151
 12.7x108mm 182 88 88 17% 6 6 6 6 6 6
152
 12.7x108mm Tracer 199 80 95 17% 6 6 6 6 6 6
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