No, I do not have the charts for the lazzeroni, but if you are looking for short action cartridges with a high BC, I would focus on the 6.5's. Look at the .260 (not very many good factory loadings) and the 6.5x284 (one good factory loading from Blackhills). The 7mm-08 is another one that might be worth looking at.
I agree about the 6.5s, you have the .260 and the 6.5x284. For load data, look at any of the powder company web sites. This is a nice picture of the round and a few loads to go with it. The 139 - 142 grain bullets have high BC, above .595, and Sectional Density that rivals or beats the 190 grain Sierra .308.
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