Veral over at LBT cut me a 260 grains WFN that shoots great in my FA97. If my memory serves me right he recommended a WFN due to greater bearing surface with the shorter bullet. The RCBS 300 SWC is also a great bullet that'll fit the 97 as well, but recoil is on the snappy side with that one.
Could you be more specific on the bullet? What did you size to? Aprox what velocity did you push to? BHN? Another guy on a different forum got abismal results with that bullet and I had high hopes for it. I have only shot factory bullets from mine but am interested in this thread also.
Velocities are advertised not confirmed.
Buffalo Bore 300 gr 1200fps JSP (speer I think) shot like a laser Moderate+ recoil
DT 255 SWC 1450fps good results, Moderate+ recoil
Georgia Arms 230gr 900fps Shot great, mild recoil
Georgia Arms 260gr 1200fps very accurate, fun to shoot.
I wasn't shooting off bags for 1/4 inch groups but it was putting holes on top of one another if I took my time.