A friend of mine contacted me recently about selling his Ruger #1 50-90 Sharps, dies, 150 pieces of new Starline brass, and had never been fired....... I can't turn down a new toy like that to play with.
While most of my bullet stock is .500 and not .510, I still have more than most regardless, I have a couple of 51 Alaskans and 510 Wells. 50-90 Sharps might be big fun especially in a Ruger #1. So the last few days I have been playing with some loads. I am quite fond of the 510 CEB Solid and its matching 475 gr Raptor. I have seen these at work in 500 NE for some years now and the Raptor turns buffalo inside out. While I won't ever hunt this gun, I decided I would see if I could get these to around 2200 fps or so....... Most data available obviously would not have data for these bullets, so I borrowed some data from my own 500 B&M, which is a 2.5 inch RUM case. Anything I would borrow from that cartridge would be under the pressures listed for it in the 50-90. I played with IMR 8208, H-322, and Win 748. IMR 8208 did not behave well, had a few scratchy block drops, so I discontinued it. Win 748 would not get me where I wanted to be, but it ran the 510 Solids nicely at 1900 fps. H-322 really shined with these bullets in this cartridge. I did not run pressure data, but cases and all other indicators are fantastic and no issue, other than this thing really knocks the crap out of you. I am sure I could do a little more with it, but there is no need to.