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"Slug-jump" of C. Norman Brown's .35 Brown Whelen reamer at JGS = 0.095":
Zero parallel-sided free-bore, leade starting at 0.361" base X 1*00'00" leade semi-angle.

Find a .358-caliber bullet around 225-gr to 250-gr with G1 BC of about 0.420
and download/restrict the .35 W+ to about 2500-2600 fps MV
and VOILA !
Another set of ballistic training wheels for the .458 WM+ with 404-gr Shock Hammer,
and trainer is loaded for bear to boot.

The .35 Whelen loaded long (.35 W+) can exceed the net case capacity of the .35 Brown Whelen with same bullet,
since standard .35 Whelen gross case capacity = 73.3 grains (longer neck and narrower shoulder)
and .35 Brown Whelen gross case capacity = 78.0 grains H2O.
Both have max brass length of 2.494" and usual max COL 3.340".
The .35 W+ wildcat beats the .35 BW wildcat.

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.