Is it me or does my gun not like my reloads?

Il always put a piece of tape in front of the rings on the scope, that way it gives you a good visual to see if the scope has moved even by 1/32” you will notice it!
 
So, I’m a newbie reloader. Currently loading up 308 win and 6.5 creedmoor. The 308 I’m shooting out of is a TikkaT3 Battue. I’m looking to develop my own hunting loads, with cup/core bullets and N140. I use CCI BR2 primers. Federal cases.

I’ve tried Speer 150 and 165gn Hot-cor, Hornady Interlock 150. Every group is 1.5ish in or greater. I’ve also shot 5 shot groups (3 times) to add more to the sample size.

The gun is capable of a .4in group with factory Sako 150gn hunting ammo.

With the 6.5 Creed I’m shooting this out of a Weatherby Vanguard. No hunting loads; Barnes Match Burner 120gn with N555, Sako cases and white river primers . Groups are sub MOA.

Question is, what am I doing wrong with the 308? Am I just #### at reloading ?

Or is this more so, my gun being picky about bullets ?
You sound pretty attentive to detail so I will skip the crap. BTW I have only read your OP. My initial thought is the rifle is probably suspect. But reloading is always subject to your consistency with your process. I can't be objective to something I haven't witnessed. Please take my comments with a grain of salt.
Do you anneal? Do you sort brass by manufacture and or weight? How do you measure powder? Do you take notes? How do you provide consistent neck tension?
Each time I reload I learn something new, so I sort of start again. I'm a gear head too. Don't think your doing anything wrong... Your just learning... Cheers bud
 
You sound pretty attentive to detail so I will skip the crap. BTW I have only read your OP. My initial thought is the rifle is probably suspect. But reloading is always subject to your consistency with your process. I can't be objective to something I haven't witnessed. Please take my comments with a grain of salt.
Do you anneal? Do you sort brass by manufacture and or weight? How do you measure powder? Do you take notes? How do you provide consistent neck tension?
Each time I reload I learn something new, so I sort of start again. I'm a gear head too. Don't think your doing anything wrong... Your just learning... Cheers bud
Actually, neck tension is something I’m not really paying attention to, nor can I do anything about. I have no neck turning tools or bushings etc. I definitely notice a difference between cases when I seat bullets (some have very little resistance when seating), so I guess it’s something I should pay attention to in the future.

And yeah you’re right; I did find the rifle (wandering scope) was the problem. Quite annoying as it’s happened before to me with different rings now .
 
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