3400 fps from 140s in .264 is kind of a red flag.
just sayin'
What could go wrong with a load 200 fps faster then the fastest safe 264 WM loads
I used 63.5 gr Retumbo with 140 gr Partitions for 3070 fps from a 24" barrel. Now that the throat has eroded it is much slower so it's going to get a new barrel in the near future.
