I'm using the HRBC (Hawkesbury River Bullet Company) Blackhawks (which are actually blue). They are a coated hard cast lead projectile but I haven't seen anything on their website re velocity. As 9dot3x74R wrote, they make a Copperhawk which is rated at 2200fps. All they do is change the coating - no gas checks, no lube. I was hoping that the Blackhawks would be good for 1600fps since they are meant for the 45/70 and this is about their velocity.

Westcasting is another company that also make a coated hard cast projectile (no gas check, no lube). They have a GOLD MATCH HEAVY MAGNUM range that is rated for 2300fps. They also have a GOLD MATCH EXTREME H/V range that can be driven up to 2700fps but these are only available in 0.308 and 8mm. Don't know anyone that has used these.