I am looking for some .510" cast bullets for my .500A2 and was wondering if there is anyone in Canada that carries them, or a US company that will ship to Canada?

Check with:
Cast Performance Bullet Company
P.O. Box 153
Riverton, WY 82501
Phone: 307-857-2940
You can Google their web site.

If they don't list your bullets call them they offered to custom build some bullets for my brother. I shoot these bullets in a .458 and .475 cal. They are great bullets. You can order them with gas checks as well.

Check with the Black powder cartridge long range shooters and or Sharps rifle manufact.

For My own 500AS I cast them myself.
Depending on the twist Lee makes a 50 mould that may work

Regards Martin