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And then you have to imagine how many extra calories are being burnt during recovery over the next 3 days... Too much faff. If you're consistent every week and weigh yourself reliably and regularly and seeing good progress (whether bulk/strength or cut / maintain) cal counting for the lifting doesn't really matter, you're just tweaking your carb intake to match and your body will soon tell you if you're wildly over/under.
I don't count calories out for weights or calories in for fruit/veg... Seems to work out OK.
I'm absolutely bursting during my lifting sessions at the moment. Lack of time means that I only really wait between sets to load/deload plates and catch my breath a bit. 400kcals an hour really doesn't seem out the question.
If you can't imagine burning 400kcals in an hour lifting, I'd be more concerned about the lack of intensity in your sessions tbh!