Mate...you are welcome to put whatever you like down to sit on...so long as you are comfortable and can enjoy a beer or 3 thats all that matters mate. You are never too old to relax and enjoy good company, which we have an abundance of on this Forum.
I know what you mean about the .308 case...has to be about the best calibre and parent case for many other excellent calibres. My favourite is my .243 Weatherby Vanguard, again another great calibre built on the .308 case.
Varget, or AR2208 as we know it, is about the most versatile powder I have encountered. I'm sorry I can't help you with advice on the Ramshot powders though.
Ptssshhhhhh...ah, the sound of another Fosters being cracked.