When in doubt Pull them.
Not knowing the particulars of what you loaded, bullet weight, weight of powder, mixed head stamps? Manny of margins of errors that can cancel each other out. If all brass is same head stamp it could be a reasonable assumption that all cases will be the same weight if they were the same length.
In order for any weight approach to work more reliably try first to weigh 50-100 bullets, and cases separately to see if the cumulative variations of both could mask one another.
Take the heaviest bullet and case weight add them together let this =A, now take the lightest of each add them together let this =B
If A-B meets or exceeds the weight of the powder shot in question this method is not going to work 100% pull them.