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Federal 7mm Backcountry

No. The 458WM and 458 Lott are both straight walls over 60K psi. 454 Casull around 65K. Straight wall cases have less bolt thrust than tapered cases at lower pressures. Not sure if that still applies up to 80K psi, but a Rossi 92 contains the Casull and I wouldn’t rank it as one of the stronger rifles out there. The straightwall aspect is not a problem for handling pressure.
Ah, ok. Thanks for answering my question. Much appreciated.
 

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