.380 win small rifle primers discussion and questions.

[Snarky]

i recently started reloading and was wondering what primers to use with my .308 srp alpha brass. also powder recommendations.
i will be shooting berger 168 hybrid or the 175 lrbt bullets.

i have read that the magnum srp will affect pressure data, but the regular srp sometimes dont like the cold.
^ is it safe to use magnum srp or start with regular srp?

i dont know if i should be using magnum srp or standard with this brass. the powders i was going to chose from where - varget, h4895, imr 4064, imr 4895, or n140 based on quickload % fill, speeds and pressure. i still have not decided on what powder or brand of primer i will use, so recommendations would be great.