From Sir Jerry:

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Make up some practice loads with those to match the .458 WM+ trajectory.
Practice with scope and iron sights if you got 'em.

The only 7mm rifles in my cache are the 7x57mm Ruger M77 Mk II walnut & blue
and a 7mm STW Remington M700 stainless/synthetic.
Both are accurate shooters.
Accuracy is about the only thing the 7mm STW has going for it.

Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.