*Gulp, $3.00/round*...but, it is another new factory loading for the 450b, from Underwood Ammo, 220gr Lehigh Extreme Hunter solid copper, at 2385 fps:
https://underwoodammo.com/shop/450-bush ... me-hunter/
I just got a couple boxes of their 245gr brass boolit load to test in the 20" original Bushy AR...I suppose I'll have to bite the bullet ( ) and get some of these new 220-grainers also...soon as I knock over the local liquor store...