That 300 running at 1800 should be a nice shooting load. Early on with the 45-70 I ran 300's up to pretty quick speeds and I never noticed any difference from keeping them down around 2000 or so. 1800 is still a pretty good load and with a decent zero will get you out to distance pretty easily. Good luck, that should be a great bullet. Wished they would release them for us handloaders.
