Maybe the Mods will move this to the reloading section!
Zombieslater,What are you wanting to load for? Hunting loads-Big game,Small game - Target shooting.
Each rifle will shoot different,so your loads will vary a little from what someone else loads.
Brass-I like Winchester brass.I've always gotten the most life out of it over Remington brass.Or if you want to spend more $$,Hornady or Lapua brass is excellent.
Primers-As long as you use the same primer for your loads they will be consistant,but I always will try different brands once I get a load worked up.You will see differences in POI,but sometimes the primer change will improve the accuracy of the load.
Powders-I use Varget,Reloader 15 & 19 for most of my 308 loads.Reloader 15 is the best powder on most of my loads.
Bullets-I have a large selection of .308 bullets,since I load for 308,30/06,and 300WM from 150gr-220gr.
Your Tikka should have a 1-10 twist,so it will shoot just about any weight of bullet up to a 220gr. Most hunting bullets I use are 150gr-168gr with the 308,and I use a 168gr Nosler C/T Silvertip mainly.
Berger,Hornady,Nosler,and Sierra are the brands I mainly shoot.