About 30 years or so ago I had a switch barrel rifle made on a Remington action with barrels in 280 & 7MM Gibbs. After all the fire forming I did get just over 100FPS with the Gibbs & despite shooting some mulies & lopes could see no real difference between the 280. I haven't installed the 7MM Gibbs barrel in over 20 years but was recently given several boxes of new formed & stamped brass. I may decide to load some up just for the fun of it. The switch barrel rifle concept & improved cartridges turned out to be just another PITA to my way of thinking.
