You don't say what hardness, diameter, gaschecked or not, lube, etc. these bullets are you have. But assuming worst case - factory made, commercial lube, no gascheck, I'd start with about 7.0gr. of Green Dot and work up a half grain at a time until accuracy went away. They'll probably max out around 1400-1500 fps in a good barrel. If they're gaschecked and fit your rifle's throat, you might get away with loads as much as maybe 13 or 14 grains, but pay attention to pressure signs when you start approaching 1800 fps or so with this fast powder. Just for reference, I use 6.0 Green Dot in my .223 with 55gr. cast bullets at 1800 fps, and 4.5gr. in the 7.62X39 with 115gr. 32-20 bullets at 1200 fps. As for Red Dot, I usually load it .5 grain (one half) less than Green for the same speed. They're very close to the same in most rifle cartridges.