I am going to test out some cast boolits a member here gave me in my 416 Ruger. Most of the data I have found for lighter 300gr cast uses 5744 which is kinda pricey. I ran across several web posts including information from Shooters World that Buffalo Rifle is a direct replacement but have no data. I bought 8lbs of it at a gunshow to try it.
My question is would it be better to start testing in a smaller case than the 416 to see how it compares or would it matter?