Re: "soft bedding" for forend pressure?
Take a breath, try the Nosler Accubond, the 200gr shoots flat amazing in mine. The BT's shot like crap.. 1.5 MOA I guess. The ballistic Silver Tip shoots way better than the BT in mine. Accubond an the A-Max do the best in mine, but the accubond is tops.
Forget the soft bedding, I'm with Chris on this. I'd float it with .040" clearance all around back to the recoil lug so no touching is even remotely possible, even with a bipod being used.
My Accubond load is 90gr Retumbo at 3.660" OAL and about 3015 fps, and that's about .180" off the lands too, but it shoots good!
Unscrew the brake and see if it still shoots the same as it had been, first thing I'd check out.
Wrap tape round and round the barrel near the muzzle to alter harmonics, retest, wrap more, retest etc and see if this changes anything.
Check one varable at a time methodically.