Although I guess a clone, this is a Stiller action.
The better the componetry,the easier the diagnosis and lotsa folks are in a hurry to overlook that obvious.
If/when assembly and fastener tightness are verified,as well as glass...it's bedding. Rifles shoot loose,they do not shoot tight and I'm ALWAYS going to tighten things more than most,due those simplistic facts.
Chasing one's tail with moot reloading "practices",will yield nothing but lotsa mediocre performance and nothing can be learned when dots aren't connected.
Rest assured,there's method to the madness and Starting At The [bleep] Start can ONLY bear fruit and connect dots.....................(hint)