I am going to purchase some hard cast lead bullets, 158gr SWC, and load up some target/plinking rounds for my GP100 357 mag.
Being new to this, I have been doing a lot of reading, and I now know that you have to match the "best" or "most-appropriate" Brinell harness to the muzzle velocity you plan on shooting to avoid/minimize "leading".

I know I will need to do my testing to come up with some good "fits" that do not lead-up too badly, but am looking for some recommendations from experienced folks.

So, what Brinell factor do you recommend I purchase for the following muzzle velocity ranges:
800 to 1,000 fps
1,000 to 1,200 fps

Also, who is your favorite hard cast lead bullet supplier? Looks like they all have approx the same price, but no doubt some are higher-quality and better customer service?

Thanks for your suggestions on this!

Crab

“Even if you’re on the right track, you’ll get run over if you just sit there.”
--- Will Rogers