Do you metagame?

[Raptor]

I do admit to metagaming a lot, and sometimes for good reason. Here's an example; we all know that the weapon stats bars presented in-game by, say Battlefield or Call of Duty, are pretty meaningless. I tend to look for the raw game files and people who post real game data on weapon performance (symthic.com has very detailed weapon data charts and spreadsheets for both COD and BF). For example, in the case of BO2, the game never gives you solid numbers on how much the foregrip decreases recoil, or how much range the suppressor reduces. Know exact statistics can give you a pretty substantial advantage at times. Thing is, when I know exactly how a weapon will perform, I often find myself using very powerful setups and combinations that the average player may not be aware of, like in BF3 where I would slap HBAR on the AN-94 and taking advantage of the burst fire spread recovery.

I've also metagamed the Mass Effect series to get some of the more favorable outcomes, i.e. keeping Wrex alive and curing the genophage, securing peace between Geth and Quarians, etc. And this doesn't include my MP metagaming, such as (ab)using the infamous (yet quietly permitted by Bioware) warp+incendiary cheese and using elevation difference to avoid sync-kills. To be honest, by spoiling the story, I tend to somewhat break my immersion in the game by metagaming.

So yes, I'm a dirty metagamer. Do you metagame, and more importantly, do you think it ruins the immersion/experience, especially for RPG games such as Mass Effect?