The 458 WSM is an amazing achievement in the industry. When designing our product line, this was number 2 on our list. A few months into it, we found a simple post online from the late John Noveske. He was starting to fireform brass for this caliber and had a die set made. Pretty neat to rub shoulders with a legend.
We wanted the caliber to be versatile, that is our goal for all of the WSMs. What if we could take the super and subsonic concepts of 300 Blackout and apply it here like we did with 338 FEDERAL. We almost bit off more than we could chew.
First we wanted a lighter ammo that would mimic 45-70. Up from there would be loads that equaled and surpassed it's taller brother, the 458 WIN MAG. Lastly, we wanted an insanely heavy subsonic. For what, we really don't know. It was just a great idea and we ran with it. Every time we or anyone else pulls the trigger on this bad boy, a huge smile appears on all faces.
This could be considered the ultimate brush gun. When this thing goes off, there may not be any brush left. Available in AR, Bolt, and Lever Action, it is a stout round, but can be tamed with a suppressor. When shooting 150 yards or less, the 458 WSM with 400gr+ bullets is great for All Bears and the African Big 5. When shooting 200 yards or less with lighter bullets, the 458 WSM is great for medium to large game.
Guides, Outfitters, and Professional Hunters, this would be a dream backup gun for you!
Brass is currently custom made for this caliber. We will say she is not cheap to shoot and are working diligently with brass manufacturers to bring the cost down. Ammo prices currently range from $109- $159 per box. That is comparable to the 458 WIN MAG ammo in price. We expect cost to stabilize at $90-$120 per box in the next 6-12 months. We offer a reload program that will essentially makes this $70 a box to shoot. WELL WORTH IT!
We offer Die Sets and Brass at a great price. Load data is complimentary to those who purchase this wonderful caliber. We have made this the most powerful AR sending that 350gr Speer over 2650FPS. We do not sell that load but will share the data that did it.
Here are the numbers from our XBH-700 Safari with a 20" Barrel. MER stands for Maximum Effective Range. This is the distance to where a particular bullet has the minimum speed to perform properly.
Bullet Speed Energy MER
350gr Speer 2565 FPS 5100 FT LBS 200 yds
400gr WDLEE PP 2325 FPS 4800 FT LBS 150 yds
480gr WDLEE RN 2170 FPS 5000 FT LBS 150 yds
480gr WDLEE SLD 2140 FPS 4885 FT LBS 150 yds
700gr MAKER SUB 1060 FPS 1750 FT LBS 100 yds