Oh, I know... Normally I would, but both that KeyMo, brake, and can are all proven on other rifles before. Unless their muzzle threads were cut crooked... I suppose that's possible. But I'll re-torque and try unsuppressed next weekend, if I get time to go up there.
I just pulled it completely apart and disassembled the whole chassis. I cleaned all the gunk out of it (surprising on a new gun to have rusty-colored thick gunk all inside it), and properly retorqued everything to spec. The front action screw seemed to be installed lighter than 65 in-lbs. So, hopefully that will fix it. We'll give it a try next weekend.
I always do the same, but for some reason, I didn’t with the MPR’s. I guess I’ll do the other one this evening, even though it’s shooting great.
I got 2700 w/ 30.0 of Lever Berger 108s and 2780 w/ 30.3 and Sierra 107s and Seekins AR 18” 1:7.5 but had some pressure signs from ejector with both.
Yeah, 2800 no pressure with Lever should be easy.
I'd go a true 1:7 if you plan on shooting heavies, like the 110, 112, and 115gr bullets. Also, thoat the chamber deeper, so you can maximize case capacity. Mine has a short throat (like all Christensen rifles), so I'm losing a fair bit of case capacity with the long 115's. I'm having to seat them at 1.700", which is only 0.007" off the lands.
The range is hosting some stupid Wildlife division tactic training course at the range, blocking the entire long range section, and didn't tell anyone. So, I packed up all my shit, drove up there, only to have to turn right around and drive back home and unload everything, and wait until next weekend. 
Can't wait until I buy some more property and build my own damn range, so I don't have to deal with their bullshit anymore, and I will only use them for an FFL/SOT to buy cans and order guns through. 
Just to clarify, the 1.700” is measured from the ogive of the bullet using a comparator and flat base on my calipers, not the tip. Tips of bullets tend to not be very uniform, so ogive measurements are what most handloaders use, because that is what contacts the rifling, and it is a much more universal and consistent location to measure on the bullets.
Yes, CBTO for the cartridge. I was referencing COAL for the MDT magazine length fitment.
Got it. We will take a good look at it when it gets back to the shop.
I dropped it at the FFL yesterday on my way home. They said it was going to go out in today UPS drop this morning. So, y’all should have it by Friday.
He doesn’t need to reinstall the muzzle brake properly, because I’m just going to remove it immediately upon arrival. He can just hand-tighten it like I did, just for shipping purposes to tighten up the gap in the foam. And if they want to throw on a black thread protector, that would be cool.
Excellent! Thanks for the update David.
It's all good, I'm not in a rush, just hadn't heard anything in a while, and was curious as to what all was going on in the process, and what they decided to do on the chambers and twist rates?
4 out of 5 shoot amazing. Sub-1/2 MOA, most 1/3-1/4 MOA. Better than some of the other factory rifles I’ve owned.
Jimmy, I’m glad I could help with diagnosing an issue that will help others in the future. Sometimes it just takes a seasoned handloader to find a flaw/issue that factory ammo shooters might never notice. But I’m happy it is fixed, and will help other shooters moving forward.
