Cooked meat should weigh less

[Thales]

In real life, meat loses some of its water when it is cooked. So it becomes ~25% lighter in weight. In The Long Dark, cooked meat should weigh less.

Edited May 25, 2020 by Thales

[RegentRelic]

I think raw meat should weigh more.

[UTC-10]

I think the devs were thinking of game-play simplicity rather than realism.  It does leave them some flexibility for changes in the future though I suspect that would be after episode 5 comes out so it would be The Long Wait.