OP: That does seem pretty long. Did they "ream" the chamber or "polish" it? Normally a rough chamber just gets polished. If they reamed it, maybe something went wrong. I've got a Savage 10/110 Predator in 6.5cm that's arguably the most accurate rifle I own, currently. It shoots consistent groups right at .3 with my handloads - 140gr Nosler BTs over 42gr H4350 in Lapua brass and CCI BR4 primers doing 2825fps. They measure 2.246 base to ogive. They're around 2.78 OAL and have plenty of room in the blind magazine. However, they're kissing my lands.
I'd take it to a local gunsmith and have him look at the chamber and let you know if there's something up with it. Then, if it IS way out of spec, you can contact Savage armed with specific ammo - excuse the pun. Everyone I know has had great luck with Savage in terms of accuracy. But, it seems like all the rifles come with some sort of minor issue. Mine had a faulty extractor that wasn't machined properly. I chose to have a local GS fix it for me for a few dollars instead of waiting on Savage to do it. If your chamber is out of spec, it's an EASY fix on a Savage- swap the barrel.
Being disappointed is natural but I wouldn't get too upset. It's a factory rifle after all and once you get it straightened out, it'll be a great shooter - Savage is just that way. Only Tikka is better out of the box.
You might try those Nosler BTs I've had such success with. Or try finding a seating depth with a big jump that your rifle likes. Even Bergers will shoot with big jumps in some rifles. On the other hand, you might find a bullet that your rifle likes a lot that isn't necessarily a popular LR bullet with super high BC. I normally shoot Bergers and intended to develop a load for this Savage but it's my wife's and she likes factory Nosler ammo loaded with those Ballistic Tips. So, I decided to work her up a handloads with them before I started playing with the HVLDS. When I found a load that produced groups in the .3s I was a little surprised. I see guys happy with their sub .75 loads using Bergers. I'll put my .3 load with BTs up against one of those loads every day of the week. My point is, I think people can get too hung up on BC. It's important, no doubt; but consistent group size is the ultimate goal, IMO.
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