For starters, try some other bullets. I have had very mixed results with Accubonds in a number of rifles and calibers.
I own a Remington 700 CDL chambered in 300 WSM and had little problem getting 3/4 inch groups using the 168 grain Barnes TSX or 180 grain Nosler Partition. I simply load these bullets to an OAL length of 2.84 inches so that they will fit the magazine. Sure, they have a large jump to the lands, but it does not seem to matter.
I have worked up loads for six rifles chambered in 300WSM. All of them shot quite well with a load that consists of a Winchester case, Fed 215M primer, a near max load of H 4350, and the 168 TSX seated to 2.84 inches.
This load, in the hands of my friends, has not only proven itself here in America, but in Africa, New Zealand, and Spain.
No complaints.
