There is data out there for the 6.5PCC, just have to search for it. Do you have a ballistics app on a smart phone? That will give you all you need. If you have questions, feel free to ask or message me to take a look at a thread. There are not a lot of 6.5PCCs in the wild, but I thoroughly enjoy mine.
6.5G feeds okay if you fill the mags half full or less, or buy the specific 6.5G mags. We have several guys that shoot them in practical rifle matches here and none of them load past half full, or they lose.