If youre trying to work up to max with compressed loads, case capacity becomes critical. the Barnes load is listed with a Winchester case, which likely has a greater capacity than the Starline brass you're using. For Barnes bullets, the load data listed on their site is usually excellent. I'f you're wanting to work up a TTSX load I'd go with their data. I've also found that for most any cartridge I get the best performance and accuracy from a load that totally fills the case or is compressed.