I doubt that. The .454 has a SAAMI MAP of 65 KPSI. The .44 Mag is 36 KPSI and the .357 is 35 KPSI. The 77/XX action uses a rear locking bolt, a design that is perfectly suitable for current chamberings in the rifle, but supreme strength is not great with that design I think.

Of course if you don't care much for your face...

My sample of one says that accuracy in the MOA realm is doable with the 77/44, don't see any reason for the .357 model to do worse.

100 yard target w/300 gr. paper patch

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End of the road:

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I am..........disturbed.

Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain