Be aware there are at least two very different shapes - ones that fit properly into a 458 Win Mag throat will not likely work well in a 45-70 - same diameter, same weight, different throat shape. Contact jethunter guy, here on CGN to find the difference.
Try jet bullets in wetaskiwin alberta. https://jetbullets.com/hard-cast-bullets
Bullet barn in BC
300 to 500 depending on the price. See pic , this is what I am looking for ideally.
Retreever
View attachment 433966
That pointy bullet will not be suitable for use in a tubular magazine.



























