On one hand, you're not supposed to use House Rules in SRM. On the other, the rules aren't written to be watertight and embrace a paradigm of allowing a GM to decide "whatever works for your table" quite a lot of the time.
So one particular rule has me wanting to solicit opinions for a specifically SRM context: Making a Ranged Attack in Melee (SR5 pg 177).
I don't have a question about the rule per se. My question is would it be more "House Rule" or more "whatever works for my table" to say the -3 dice pool penalty isn't one size fits all but can vary based on the context. You know, like using a pistol might even be less than -3 whereas a rifle might be more than -4 dice. For what it's worth, the rules themselves actually never codify a value for the penalty. You have to find the chart (nearest one is on the page preceding) to find a value... so in light of the rules not specifying a value is that value written in stone or is it reasonably malleable?