The chance of a shooter scoring a hit on his target depends on his ballistic skill, or BS. the higher the individual's BS, the greater his chance of hitting. To determine whether you hit you must roll a D6 for each model shooting. Count how many models in your unit are shooting, and roll that number of dice. It is easiest to roll all the dice at once, although you don't have to do so. If you have a lot of models shooting you may have to roll several batches of dice. The following table shows the minimum D6 score you will need to hit.
BS | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
D6 Score | 6 | 5 | 4 | 3 | 2 | 1 | 0 | -1 | -2 | -3 |
If you score at least the number required you have hit, if you score less you have missed.
For example: You fire with 5 Goblin archers. Goblins have BS 3, so you need a score of at least 4 to hit. You roll 5 dice and score 1, 2, 2, 4, and 6 - 2 hits and 3 misses.
Of course, you cannot roll less than 1 on a D6, so troops with a BS of 6 or more will invariably hit. However, circumstances can make it harder to hit as described below, and this may increase the dice score required so that even troops with very high BS values can find it difficult to hit their target.