Sir Ron, I have no Benchmark but I am satisfied with AA2230. Excellent velocity at 3.380 COAL and fine accuracy
Sir John, So far, that is my top load too, or you can use AA-2460 with a wee bit of compression, or H4895 with a lot of compression. 2500 fps with 404-gr Shock Hammer is superb. I better get to work on some Benchmark loads with 400-ish grainers to see how the "standard" load compares to this. I have neglected Benchmark too long.
BTW, here is the only clue to .458 Winchester Magnum Denial Syndrome that I was ever able to dig up:
The guy above on the right is also fond of the SAAMI .458 Lott, but he thinks the .458 WinMag kicks too much. Go figger ! Same character flaws for the guy shooting a .577 Trex below:
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.