I have Win. 231 powder. Rainier Ballistics Leadsafe Total Copper Jacketed Bullets (185 gr. FP) and diffrent once fired brass. I have not purchased Primers yet.

How do i know the amount of powder to put in each round when reloading if i have diffrent cases. I understand that depending on what bullet i have - will need to load accordingly, but how do i know how to load the diffrent cases. every manual i look at specifies the powder and grain bullet, but not the case. any suggestions or websites i should read? Thanks. R

- i understand the less displacement in the case the higher the pressure will be.