My factory Weatherby triggers will dial an extremely crisp 15 ounces out of the box. With merely a $5 trigger spring change it will go 6 ounces. The Accu-trigger may be an improvement but I will never know. The freebore is not an issue and I think you will find that even Kirby's guns when throated for the heavy bullets are sporting quite a bit of freebore. Shoot them with light or regular weight bullets and they still shoot well. So do my Weatherby's. I can post some crazy tight groups if you want. Nothing like Kirby's 500 yard groups but my 100 yards groups compare. Now which Savage action were you going to use to build that 338 Lapua class round on?
I have already talked to Kirby about a real long range gun and just can't swing it right now. I did turn a buddy on to him and they are doing up a real rig in his new 338AM. For me I will have to stick to my poor mans long range setups. To me, nothing else out of the box comes close to an Accumark for the money. Here is my cheapy 300Wby. I have $1150 in the whole thing, scope and all, and it will deliver 200 grain Accubond to 1000 yards with 1335 foot pounds of energy and only 23.36 moa correction. Not to bad for a .308". Tested at 500 it is still sub moa. With the money I saved I am about to pop for a better scope. Then I will do some more serious paper punching work.
Different strokes for different folk I guess.