I hear they're good for Pellets,Not #3 Buckshot! Maybe P A will sell Gamo .25 RB's again ,They should be soft enough!
If you wanna Use #3 Buck Try TOW Linerfor the .25-20WCF that had a .250 Bore,.257 Groove 1:14" RH 6-Groove twist! there's another for the .25-35 with 1:10 RH Twist .250 Bore,.257 Gr(6 Grooves) All @ $5.09 Per Inch!