I have two of these.
Savage 12 VarmintI still use them, but to be honest I had to put a ton of debugging work into getting them to ignite various primers. I bought one of them lightly used and one brand new, and they came from different places and have spread serial numbers, but both had the same ignition problems.
I debugged them and solved the issues, but it left a bad taste in my mouth... I'm not sure I will keep them once the bbls are gone, or if I will risk having them re-barreled.
In several instances, guys at the club who bought similar centerfire Savage rifles, had receivers so crooked that the guns could not be boresighted without custom orthopedic mounts.
We have a 250 member cap, so that means the QC issues with Savage rifles are not rare. They can be capable of good performance when/if they work, but the sloppy QC is a real issue.
Another friend who had a similar wood stocked one in 204 Ruger made the mistake of sending one back to Savage when it had that same crooked issue. Here was where Savage turned the corner on me...
They agreed it was a reject and then they kept it and couldn't replace it with the same kind because they don't run them in 204 very often. They ended up sending him something in a chassis gun that he agreed to, but he regretted it. That left me really wondering about Savage. During their summer shut down for vacation and plant maintenance, they were bought out by members of the board of directors. Maybe this will help?
So, not to dissuade you from that model just because it is a Savage, but get your hands on one first and buy it from someone who will help you get it straightened out if there are problems.
My two heavy Savage 12s in 223 with 1:7 work okay now. Mine are not predator or walking rigs, they are for being benched near the truck and shooting sustained sessions from a swivel table. They use proprietary magazines that work okay. They have a decent trigger. I run SMK 77 and SMK 80s through them and they have been effective on prairie dogs to 600 yards, but are not as good as the old Sendero rigs from previous decades.
I'm still looking for a lighter bolt gun to walk with for coyotes in order to dedicate one rig to these crazy CA lead-free ammo restrictions. We are allowed to red-light at night, but the light cannot be attached to the gun. Just another crazy left wing anti-hunter law that makes me miserable...
I'll keep watching for heavy varminters and lighter predator rigs along with you, but I'm fairly sure I will have to use what I have ready for this year. I will probably burn both of those Savage bbls by the end of this season, so I am hoping to have a better plan for next year soon in case I decide to order bbls for rebuilds. It takes almost a full year to have the rigs back in my hands at the point where I order.