my experience in 300 win is that it's a bit faster than H4831, 74 gr vs 80 with a 178 AH seated out. you will also see reduced load density vs H4831 so gr for gr they take up approx the same capacity. I got almost as much velocity with 4955 within about 20 fps so really very close there. Once you start seeing pressure signs they build a lot quicker than H4831 so approach max with the appropriate cautions.
I’ve played with it a bit…tbh i stopped because, like @Carsyn.22 says, it goes from no pressure signs AT ALL to a sticky bolt and cratered primer within 1 grain charge difference in my .300 Winnie a few years ago. Kind of freaked me out, never seen quite that degree of “okay…okay…okay…NOT OKAY!” with any other powder I’ve worked with before.