SmallCaliberCentral

I plan on getting 4 different grain bullets to try. I will be getting them from bullet samples and will be trying the berger match vld in 155, 168, 175, and 190 grain. I also will be using H4895 powder. now for the most part there is a 2.5 grain difference from start to max loads. So my question is what grain increase should I use.
Sportingly
Cracker

0.3 will be the ticket.