In my loads with 231 i used cotton as a case filler, and that helped with my velocity spread a bit, but yours are already better than i was getting.
I think bore fit may have more to do with accuracy since these are cast bullets. I got decent accuracy even with what seemed like inconsistent velocity.
The 245s were pretty tight in my gun, i managed to get one stuck about 4" from the muzzle so i tapped it out with a brass rod. Measured at the first band it was .308 and change according to my caliper, base bullet dia was .310ish, if i remeber correctly, again measured with the caliper.
Missed the 1.5@50, thats about what i was getting.
I think bore fit may have more to do with accuracy since these are cast bullets. I got decent accuracy even with what seemed like inconsistent velocity.
The 245s were pretty tight in my gun, i managed to get one stuck about 4" from the muzzle so i tapped it out with a brass rod. Measured at the first band it was .308 and change according to my caliper, base bullet dia was .310ish, if i remeber correctly, again measured with the caliper.
Missed the 1.5@50, thats about what i was getting.