When I first screwed it together at the specified torque from MDT (60 inch pounds) I could not insert the bolt into the action. The rear tang was not supported and the action was bindingunder the stress. Don't recall at what amount I could insert the bolt but it was probably around 20 inch pounds or less on the rear screw. I didn't feel good about that and reached out to Ultimatum for their suggestions. They suggested using a set screw to apply some pressure under the rear tang (see pictures below) so that the action wouldn't bind when tightened.
Fast forward and I have worked through my factory ammo, 225g Hornady Match, to get the brass and have started load development with 230g Bergers and Retumbo. Working through all my loads I couldn't print anything much better than 1 moa. Factory ammo was sh^t and I was recording ES's of 130 fps with my labradar so I was not too concerned with the poor accuracy at the time.
After getting initial poor results on my loads I suspected something was up because my factory Tikka CTR in a MDT ESS prints groups half the size of the best results achieved with the Deadline. I am loading with a Auto Trickler, AandD 120 scale and Coax press with Whidden dies so I am pretty sure of my process. SD was typically under 10 fps through all the loads fired and consistent with my other reloads.
Below are pictures of the action and the chassis. You can see where the two are contacting. For sure I think the rear tang needs to be bedded but not sure about the recoil lug and along the length of the action. Along the length of the action it looks like there is minimal contact.
I have already picked up the Devcon, putty, neutral polish in prep to do this but thought I would see what the team here thinks before messing the stock up.
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