Is something wrong?

[Davidm]

DavidM.......................If they chamber easily and shoot and extract well, you may want to simply ignore this "problem".......FWB

They chamber easily but I haven't yet fired them to see if there is a change in impact or not. I still had some unfired brass left so I loaded them up first

 

[Hogpatrol]

Redding makes .458 Lott dies. Midway has them in stock.

https://www.midwayusa.com/product/249332/redding-3-die-set-458-lott

 

[flatwater bill]

Redding are my favority dies. But if you have only one rifle in this caliber, and hence don't need to extensively resize, simply back the resizing die off a little, tumble and clean brass, see if the unfired chamber easily, and proceed to load a moderate loading. Black powder cartridge shooters are familiar with loaded rounds that look like your initial example. Unless the situation is extreme, they often shoot just fine.......................FWB

 

[norfolk shooter]

Does this issue come up with the bottle neck hornady dies??