Used to use a Stoney Point OAL length gauge (aka comparator) with their modified cases.
Now use that comparator in conjunction with a once fired case from the rifle I'm loading for that has been deprimed and neck sized. I cut a lengthwise slit in the case neck but any of the above methods for holding the bullet will work.
The OAL to touch the lands is written down and placed into the die box with the id of that particular rifle. It helps to recheck this occasionally as in high volume rifles the leade will wear and a couple of times I've found that ogives for a particular brand and style of bullet will have changed slightly from lot to lot.
Also - measure at least two or three different bullets in a lot to check for consistency. I bought a pile of Speers at a gunshow but the guy did not bother to mention they were factory seconds. Their ogive profiles were all over the place so OAL to touch the lands varied by a good .050".
Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!
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