Everyone one is a factory built rifle, you have a chance of getting a turd with any one of them.
I am reaching the point if I am going to spend more than the price of a tikka t3 then I may as well save up a bit and have one built to exactly what I want.
I agree with longbomber. If you are going to pay $2000-$3000 or more for a factory mass produced semi custom gun, you are already at a price point that affords you a plethora of custom options.
I have seen factory rifles that shot like true custom guns, but many more that didn't. Unfortunately, I've also seen gun smiths build- so called, "Custom Guns" that are a collection of off the shelf assembled parts that aren't much better than throwing stones.
My first bit of logic is this: While you can get amazing performance from blueprinted OEM actions, if factory guns approached custom performance the Precision Rifle Shooters wouldn't be shooting Bartlein, Brux, Krieger, etc. precision lapped barrels. They'd all be shooting Begara, Browning, Ruger, Weatherby, etc barrels.
NOT ALL CUSTOM RIFLES ARE THE SAME.
We were recently approached by an irate man at a gun show who wanted us to tell him why his $4000 custom gun didn't shoot. He had full custom a 6.5 Creedmoor built on a Rem 700 action that a local Tampa area shop, just down the street from us, had built for him. The guy Claimed the gun wouldn't shoot any ammo under 1-1/2"@100 and the bolt wouldn't close on some factory ammo. The man had supplied the action, trigger, stock, break, mounts and scope. He asked for a heavy Palma 26" Bartlein or Krieger fluted barrel with a precision match chamber. The smith charged him $2700 to supply and chamber the barrel, full blueprint the customer's 700 action/bolt, bed the action, thread the muzzle for the break and assemble the gun.
The first thing we noticed was no machining whatsoever had been done to the bolt. A Remington factory recoil lug was used. Not a good sign. The original finish of the action still wrapped around the action face and went under the recoil lug. We removed the action and found no bedding work. We pulled the break. The threads looked like they'd been die cut. The bolt wouldn't close because the headspace was short. The chamber was straight SAAMI cut at the max ID spec. When we pulled the barrel and confirmed no machine work had been done to the action. The action face retained the factory machined finish. The threads were 1.062 not 1.072. While we couldn't identify the barrel, it was a cheap button rifled unit. I'm sure it was a pre-chambered barrel bought off eBay or the like.
The guy finally got his custom one-hole rifle for another $1500. ($5500) He was so happy he's sent us several customers.
Build or buy a true custom gun if it's even a close call.
BUT Find a reputable smith and talk with people who shoot their guns before you write a check. Buy your gun once and be happy.
The smiths that screwed our guy have a huge social media presence. This is where they put their efforts. They claim to be ex spec ops warriors. Huge FB following. They run combat pistol classes for snowflakes. They have lots of tattoos. We couldn't find anyone actually shooting their guns. So I PM-ed them on FB like a potential customer. They tried to get me to order a rifle by phone. I went back and forth a few times with them and eventually asked for a tour of their shop to see how they built rifles. They had a bunch of reasons why customers could not go into their shop. The one person I did manage to speak to who had seen the shop told me they had a drill press, a grinder and a bunch of hand tools on pegboard but they are selling $5000 rifles regularly.
The moral of the story is you might get a $2000 to $3000 factory gun that will shoot 1/2" or even 1/4". There are other considerations in addition to accuracy. I'm a BART fan. Their bore finishes are virtually flawless. Mine shoot and shoot and don't foul. Like most tier one barrels, they clean easily, while factory barrels can often shoot well for a while then foul and fall off.
For the kind of money factory customs cost you can build your gun on a rem action. Find a real gunsmith with a real reputation for building accurate rifles who will help you spec your rifle. He will ask questions and also answer your questions. Get everything in writing. A trustworthy Smith will put everything in writing and give you an accuracy guarantee. Run from anyone who won't.