Shooting Accuracy

Factors

Shooting skill
Sight: 12x importance—capped at 200% efficiency here.
Manipulation: 8x importance—capped at 100% efficiency here
Traits
- Trigger Happy: -5.0
- Careful Shooter: +5.0
Gunlink +3.0
Shoot Frenzy (Inspiration): +8.0
Post-processing curve

It is capped at 99.9% per tile, though 99.8% seems to be the highest achievable value in vanilla.

+20 from 20 Shooting skill
+12 from 200% Sight
+0 from 100% Manipulation
+5 from Careful Shooter
+3 from Gunlink
+8 from Shoot Frenzy (Inspiration)

This results in a total of 48, which the post-processing curve translates into a 99.8% value.

Analysis

The table below shows post-processed shooting accuracy per tile of distance for each skill level and trait combination, assuming the pawn is healthy:

Skill Level	Standard	Careful Shooter	Trigger-Happy	Skill Level	Standard	Careful Shooter	Trigger-Happy
0	89%	94.5%	84%	-	-	-	-
1	91%	95%	85%	11	97.25%	98.333%	95%
2	93%	95.5%	86%	12	97.5%	98.5%	95.5%
3	93.5%	96%	87%	13	97.75%	98.666%	96%
4	94%	96.5%	88%	14	98%	98.833%	96.5%
5	94.5%	97%	89%	15	98.167%	99%	97%
6	95%	97.25%	91%	16	98.333%	99.125%	97.25%
7	95.5%	97.5%	93%	17	98.5%	99.25%	97.5%
8	96%	97.75%	93.5%	18	98.666%	99.313%	97.75%
9	96.5%	98%	94%	19	98.833%	99.375%	98%
10	97%	98.167%	94.5%	20	99%	99.438%	98.167%

Note that shooting accuracy for the pawn has exponential decay calculated per tile, meaning that a small increase (even 1%) in shooting accuracy will have a significant effect at longer ranges.

For example:

A colonist with shooting accuracy of 99% has a base accuracy of 72.5% against a target 32 tiles away (0.99³² = 0.7249)
With 98% accuracy, the base accuracy against the same target becomes only 52.4% (0.98³² = 0.5239).

Full Post-Processing Curve Table

^[1]

Modified Shooting skill	Shooting Accuracy per Tile
-20	70.000%
-10	80.000%
-6	83.000%
-4	85.000%
-2	87.000%
0	89.000%
2	93.000%
4	94.000%
6	95.000%
8	96.000%
10	97.000%
12	97.500%
14	98.000%
16	98.333%
18	98.666%
20	99.000%
22	99.250%
26	99.500%
30	99.650%
40	99.800%
60	99.900%