Got it and aye, you might be right on 41% being a bit high on a wild red. I never weigh them live weight but don't think it'd be that far off. I know a bucket full of red guts is bloody heavy and hard to move and that's excluding head and legs.I’ve only ever shot one red hind in Devon, she was 65 kg larder weight so I extrapolated to around 85 kg live weight and as you’ve both correctly pointed out overegged the meat yield as I didn’t really think about it and didn’t keep the carcass. I was including heart, liver and kidneys as I include those as meat.
Do you really think head, lower legs and gralloch would weigh 35kg on an 85 kg beast? I mainly shoot roe and munties with a few fallow in between but proportions would be similar. 41% of live weight to go in the head, gralloch (excluding edible organs) and lower legs seems a lot.
There's a few more views in this thread and 60% kill weight isn't impossible: Are there any formulas to work out “hill weight” from “larder weight”