Scaredyet,
Pleasure meeting you tonight and we should organise a time for you to drop round my place and I'll get that scope mounted properly for you.
As an FYI
Barrel twist is 1:8 so it will like the heavier projectiles, the 130's were better then the 120's but it should tighten up a bit more with the 147gr Hornady ELD-M ammunition. I will be doing some load development for the 6.5 Creedmoor, once done we can see how it performs in the Howa compared to the Tikka. If / when you start reloading you'll have a winning load already worked out. How did you go after Pommemax and I left? It's a nice shooting rifle and should give you years of shooting pleasure.
I found a pic on how to adjust the length of pull as it's way short for me and massively short for you.
https://www.legacysports.com/wp-content/uploads/Instruction_Card_MBA-3_4_4.25inx5.5in-h_Legacy_pg2.jpgHowa Barrel Break-in procedure....This is a highly contentious subject but the important thing is to not over heat the barrel during maybe the first 50 rounds. As for cleaning, I'll only recommend that you give it a proper clean after each session and leaving a coat of oil in the barrel before storing.
https://www.legacysports.com/wp-content/uploads/howa-break-in.pdf