You can probably find that in any good loading manual like a Sierra manual.
Also, since there is some variation in chambers, you can go to Sinclair and get a small device to accurately measure the trim length of your particular gun.
It would require cutting away about half of the neck of a case, install the device in the case, then close the bolt on that case for the exact length.
They are caliber specific, so it would also work for other guns of that caliber by using the proper case.
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