some rifles just dont shoot worth a hoot with a certain bullet weight. My cva mountain stalker HATES the 245gr powerbelts. Put a 295gr powerbelt down and shes shooting 1 1/2" groups @ 100.
TC's doesnt recommend conicals in their rifles, they claim the twist it to fast but in truth, they can not get their QLA's drill out straight half the time.
Most people have a gun smith hack off the QLA and then they have success shooting conicals.
Stick with sabots in your case.