minihuntur,
What bullet are you handloading, what bullet diameter and what powder charge? Your drop will depend on where you have set the "as issued" rear sight on your .303 rifler, check the markings on the rear sight.
As for a bore being shot out, look down the bore and check for rifling. If you see rifling grooves, then slug the bore to see how large they measure. The final test is how the rifle groups with your accuracy handloads.
Adam
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Adam Helmer
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