Weatherby likes to throat em long(freebore) so you can get higher velocities without blowing primers. That's why aren't supposed to shoot weatherby factory loads in custom rifles. Try to calculate your bearing surface length to figure out a length that the bullet is still gripped in the neck by at least one caliber and fits in your magazine.
"For some unfortunates, poisoned by city sidewalks ... the horn of the hunter never winds at all" Robert Ruark, The Horn of the Hunter
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