@Professor Mawla ,
Good day and thank you for your reply. How stable are these loads over the long term? Is this something you want to use quickly and not leave sitting around? I think I will likely avoid them due to the complexity of the process, but it is nice to hear knowledge being shared. I wonder how it would work with Win 748 and Win 296. I have switched to 748 for its metering property and enjoy making a lot of Lott rapidly as opposed to the slow measuring of 4895.
@Forrest Halley
You are very welcome . Actually , I would strongly suggest to only hand load them at the beginning of the hunting season and break down whatever you have left at the end of the season . The only two .458 WM loads which I would recommend to be stored for prolonged periods of times are :
a ) Hornady DGX Bonded and DGS 500 grain factory loaded ammunition
b ) Nosler Partition 500 grain factory loaded ammunition
I still have two boxes of Hornady DGS 500 grain factory loads for the .458 WM , which I purchased back in 2011 . The advertised velocity was 2140 fps ( feet per second ) . Actual chronographed velocity after even nine years , was 2135 fps . This is more than adequate for any dangerous game animal alive .
I also still possess three boxes of vintage Winchester Super X grain factory loaded ammunition ( one box of 500 grain round nosed steel jacketed solids and two boxes of 510 grain soft nosed rounds ) for the .458 WM which I had purchased in 1985 . These boast an advertised velocity of 2040 feet per second , employing primitive Olin ball powder . Actual velocity ( chronographed in 2019 ) was 2027 fps . Not safe for frontal brain shots on large elephant bulls or frontal heart shots on Gaur , but perfectly adequate for Royal Bengal tigers , cheetahs and wild boars .
On a related subject , perhaps this article should interest you when you find some free time .
https://www.africahunting.com/threa...unition-for-sorting-out-dangerous-game.58911/ . I wrote it a week ago . I provided more details in it about the .458 WM and my practical use of this calibre against dangerous game .
No one will claim that the .458 WM is the best calibre in the world . That would be an extremely cavalier and untrue statement ( even though I personally would not trade mine for the world ) . But with proper loading techniques , adequate it certainly is .