To first slightly derail, the question “who makes the best drop-in barrels for the 10-22 platform“ can be replaced with the question “who makes very accurate barrels for the 10-22 platform most consistently“, which imo is a better question.
When you do that, ime the answer is “Lilja and Kidd”, with Lilja edging out Kidd by a very small margin.
I own 3 Kidd and 2 Lilja 10-22 barrels, all ~20” SS straight bull, at different times they all have been in guns and have been tested, and those are my results. Small sample - I know, but most of my personal reading supports this conclusion.
Now, when you read comments from other shooters you’ll see “10 X” more positive comments about Kidd barrels than Lilja barrels, and there’s a very good reason for that 😎 - the so-called installed base for Kidd barrels is at least that much greater, and for another great reason - Lilja costs double what the Kidd costs.
Bottom line imo is if you want to maximize your chances of getting a great drop-in barrel regardless of the cost, you go with Lilja - again, though, the return, measured in accuracy gain, on that incremental expenditure will be very small.
Finally, IF (hey, stuff happens to… EVERYONE) you need after the sale service from either one of those 2 outfits, it is widely accepted you will likely have a better experience with Kidd, perhaps much better.
Now, Lilja people 😎 have never been anything but kind and patient with me (never got a bad barrel but had questions), they answer the phone, respond to emails (once with almost an essay 😎) but you also hear from people who’ve be nearly told to *** off and die 😂🤦🏼♂️🤦🏼♂️ - okay, maybe not that, but they were according to them treated poorly, but, again, based on my personal dealings I suspect they contributed to that outcome a great deal.
… it’s close 😎
* Just saw OP made up his mind - not trying to change it, don’t have a dog in this fight 😎, leaving the response up in the unlikely event someone finds some value in it😊