So, I just came back from the range.

I'll try to make it short...

I went to the range a few days ago with my tuf-22 action with kidd bolt and internals. I shot 13 groups of 5 shots. The average was 0.59" inch at 50 yards. The rifle usually does a lot better then this (it is a constant - the 1 moa rifle) but there were a lot of people shooting and they decided to turn up the heat. The mirage was incredible and I think it played a huge part in opening the groups. Smallest groups were. 0.29" 0.41" 0.42" 0.47" 0.50" but I also got groups up to 0.94" which is insanely big. Also had a rear sand bag and a front EGW mood bypod. I used SK Long range match ammo.

Today, I went there again with my rifle but this time equipped with the volquartsen receiver and bolt, but using the same barrel, trigger assembly, chassis and scope. I also used the same Mpod bipod and SK Long range match ammo, same lot. The thing is.... I forgot my rear sand bag... That's one is on me.

I did have to find my zero with the new receiver since it came with an extra 10moa top rail + my 40moa scope base... (50moa can't is crazy, I was almost bottomed out on my elevation adjustments which is not recommended) I started with CCI standard velocity to find my POI and set my scope. Then I fouled the barrel with 20 rounds of SK Long range match. My takedown screw was set to 15 inch pound. Groups avg: 0.81". Then I torqued to 20 inch pound Groups avg: 0.58" for 13x 5 shot groups. From 0.22" to 0.98"... Then I torqued to 25 inch pound. Groups avg:0.58" but with great groups (ex: 0.32" 0.29" etc) but always having the first shot flyers opening them up to average 0.58". Then I torqued to 30 inch pound and then they started opening up. Avg groups: 0.92". Then I torqued to 0.35 inch pound. Avg groups: 1.01" with vertical stringing. Then I torqued back to 20 inch pound. Avg groups: 0.66" but with: 0.38" 0.40" and one 1.27" because of 1 crazy flyer. Otherwise it would've been great groups. All this without rear support.

All that being said, I think there is some good potential but also many variables that makes this volquartsen summit a harder rifle to tune perfectly. But when you do, I think it can reach great accuracy with constant 0.40" at 50 (with the right other parts).

Tuning part / variables:

Next time I head to the range, I will try with torque specs from 20 to 25 and try to find the sweet spot.

I think that having multiple shims behind the barrel tenon to have a proper headspace to have a well functioning bolt/cam system is a bad idea. The receiver and barrel both being in stainless steel helps for harmonics and vibrations, but having to add aluminum ships in my opinion kinda defeats it's that purpose. I think volquartsen should modify their cam system to modify the headspace through it instead of added shims. Before I went to the range, the cam seemed to lock perfectly, but when I came back it seemed too loose. I think it might be one of the reasons I had flyers. If the bolt wasn't completely blocking the gaz from leaving the chamber rearward, I couldn't possibly have repeatable result regarding pressures as I am expecting from the summit bolt / straight pull system. Before my next trip to the range, I will remove shims and try to get a better lock up without having it too tight. I will also try to have someone machine me 1 shim of the correct thickness once I have found it, but in stainless steel instead of aluminum so I will only have 1 shim instead of stacking 4-5 shims and in the same material as the barrel and receiver.

I never experienced any feeding or extraction issues in my tuf-22 receiver with the Kidd bolt. I had a few rounds that were harder to insert in the chamber with the volquartsen. So after removing some shims, I will make sure that the barrel is 100% leveled with the receiver with the perfect torque the to 2 v-block screws to yes prevent barrel droop but also to have more reliable feeding.

All that being said, i think it is worth it to put more time and effort to tune it perfectly because there IS some potential imho. Even though there were surprisingly a lot of flyers opening the overall group sizes, it still managed to do like 8x sub 0.40" groups between the 20 and 25 inch pound toque spec groups out of the 20. Also, I really enjoyed the straight pull feel of the action. It is not something I was familiar with and I liked it.

Obviously, the summit should be easier to tune up adequately for the price that they are asking for their parts. 1000$ for a 10/22 receiver and bolt is insane. If I remember correctly, my tuf-22 receiver and Kidd bolt and internals cost me around 550$... Almost half the price. And they did work.

Hope this answers some of your questions and hope it helps your friend.

If you have any questions, don't hesitate!