Reloading Cast Bullets .45-70

[bt-99]

Hi all, I have a few questions for anyone who is experienced with reloading Cast Bullets for the .45-70.
While I have reloaded ammo before I have never used cast bulets. What do I need to know about them? Do I need to lube them, and how do i do that-spray, wax,etc?
Do I need to buy copper gas checks and how do you attach them to the bottom of the bullet, do they just squeeze on?

Any input would be more than welcome.
Thanks

[notenoughguns]

Need a little more info . For a modern rifle or antique , black powder or smokeless , home cast or store bought ?

[bt-99]

It is for a H&R buffalo Classic . I am intending to load to about 14-1500 fps to start. It can handle hotter loads but I don't like recoil. It weighs about 8lbs and has a fairly narrow steel but plate. I know people load these up to about 2100fps with 350 grain speer bullets. I bought the cast bullets From Rogers better bullets, 350 gr.
Thanks

[notenoughguns]

27.0 gr.s of alliant 2400 behind a 350 gr. lead bullet will give you 1503 fps
31.0 gr.s imr 4227 1503

commercial lead are usually pre lubed and sized

[bt-99]

Thanks, do you need gas checks?

[notenoughguns]

At that velocity you shouldn't need checks , besides , if the bullets aren't designed for gas checks there's no way to install them .