Back when I was making my own bullets, I'd test my culls. At 100 yards, a full grain or more was undetectable on target.since then, most bullet makers have started using Charlie Hoods cores rather than squirting their own..myself included at that time. From what little experience I had with them, I'd say his cores would be hard to improve upon in terms of weight. Nevertheless, at short range, I think there are much more important things to worry about but many still judge a bullet by how consistently they weigh. No doubt, if we think it matters then it likely does.
