Shotgun Questions

[WussyDan]

Hey all, looking at an upcoming T2k v2.2 game soon, and I can't make heads or tails of shotgun (buckshot) rules. The idea of treating shot as a 10rd burst at medium range is fine, but I have no idea what the "5x10" under rate of fire in the weapon entries is trying to tell me. Compounding factors, the GM is looking at using a lot of Paul Mulcahy's (excellent) homebrew stuff, but that's further confused me with regard to buckshot.

For instance, a generic PA shotgun firing shot at medium range in standard 2.2 rules has "RoF 5x10" and "Dam 1" listed...which I assume is saying a 10rd burst with each hit doing 1d6 damage, but what is the "5x" indicating? Then taking that same shotgun from Paul's rules, the RoF is PA regardless of range, but then has damage listed as either "d6x16" or "2d6x4" for medium range. I'm assuming that's just a different way of representing shot spread, but I'm not sure how to square the rules, or what it's telling me.

Any advice would be welcome, especially from Paul himself if he's so inclined.