Recently purchased two M 10 280 rifles.
Currently working on the 28" bbled one.
Found cases from Buffalo Arms, dies from C&H and bullets .287 from Woodleigh.
Using 7mm Rem mag starting loads and getting 3 shot cloverleafs @50 yards from a worn and pitted bore.
Also figured how to make cases from 375 Ruger.
1. Run thru a 375 H&H FL die
2. Chamfer the inside bottom of a 300 H&H FL die to avoid raising a ridge of brass on the case.
3. Size the case down as far as you can w/o raising a brass ridge on the case.
4. Size the case in the 280 Ross FL die, checking for chambering in your rifle.
5. Check OAL and trim a bit to square up mouth.
IF you do get a ridge, chuck the case mouth in a drill and polish off the ridge with 250/400/600/crocus wet/dry paper.
The left one is a 280 Ross from Buffalo Arms, made from 50-110
The center made from a 375 Ruger, the right from a 300 WinMag.
Currently working on the 28" bbled one.
Found cases from Buffalo Arms, dies from C&H and bullets .287 from Woodleigh.
Using 7mm Rem mag starting loads and getting 3 shot cloverleafs @50 yards from a worn and pitted bore.
Also figured how to make cases from 375 Ruger.
1. Run thru a 375 H&H FL die
2. Chamfer the inside bottom of a 300 H&H FL die to avoid raising a ridge of brass on the case.
3. Size the case down as far as you can w/o raising a brass ridge on the case.
4. Size the case in the 280 Ross FL die, checking for chambering in your rifle.
5. Check OAL and trim a bit to square up mouth.
IF you do get a ridge, chuck the case mouth in a drill and polish off the ridge with 250/400/600/crocus wet/dry paper.
The left one is a 280 Ross from Buffalo Arms, made from 50-110
The center made from a 375 Ruger, the right from a 300 WinMag.