Holy mackerel,
This thread wasn't anything I was expecting to walk into but it held my attention for sure.
@welditforyou - again not to come across as being hostile but it sounds like you've got
@renaissanceman from BoreBuddy and
@Frank Green from Bartlein Barrels all participating in the thread along with several other very knowledgeable posters here that have been trying to get you squared away but (whether or not it was your intention) you've likely come across in a manner that isn't beneficial to resolving your problem. If you're ok with that- then that's your business but there's a lot of folks using their personal time to make you happy and get you shooting.
As others have mentioned, rimfire is a different animal all together. I'm going in either my 5th or 6th year of shooting NRL22 and just to put things in perspective, I shoot with VERY good people using VERY good equipment (you'll have to take my word on it but I don't want to bring attention to any of those folks). Me, I do alright but I mainly do it for fun and am just glad to be friends with them and all that I was able to learn shooting with them for years. But even with arguably the best equipment (including rifle receivers, barrels, optics, bipods, shooting bags, stocks/chassis, etc) I really do need to echo what others here continually reference and that's ammo.
Every year, heck more likely twice a year, most of our crew travels to the Lapua testing center in Ohio to get their very high end rigs matched with factory lots of ammo. And I've got to tell you, in the... 6-8+ times that they've done this, with an entire shooting clubs worth of rifles, even then, Lapua has lots of their Center-x, Midas+, X-act (going up in price) that just doesn't cooperate in their rifles. Lot X might give lousy groups in one of their rifles and be the best in another one's. They usually have to test around a dozen or so lots before they're happy with the 'match'.
I just did that this year and I cannot even begin to explain how big of a difference that made for me and my scores moving forward and (just for disclosure) this was with a Kidd Supergrade and I had been shooting ammo like SK Rifle Match, Lapua Center-X, Midas+, Eley Tenet, etc). Also keep in mind, that when it comes to 'seasoning' the barrel, a lot of the bullets mentioned here are not the same in construction, tolerances, bullet lube (that was the seasoning part) etc. Not a flex or an argument that you just haven't spent enough/whatever, just attempting to illustrate how fickle rimfire can be and how so important ammo choices are and explain that the ammunition you've mentioned using and what your expectations are (and that's assuming that there isn't 20 other potential issues that may be keeping you from your accuracy performance goals) are just not aligned with folks that do this regularly and have felt the pain of chasing this personally.
I really hope that you'll reconsider, catch your breath and work with the folks that are trying to get you squared away (with no personal benefit) other than wanting to help a fellow shooter out and hopefully once you get squared away you too can pass some of what you learned onto others getting into it. That's what's it's all about and why most of us participate here after all.
Anywho, thank you for sharing your story/experiences. I truly do hope that you're able to get things worked out and can be a happy customer/shooter.
-LD