Re: 300 RUM to 338 Lapua Mag?
Maybe someone will add to this, but I don't see any way that the Lapua is going to have twice the barrel life of the Edge, or RUM. You're shooting the same projectiles, assuming the 338RUM, at nearly the same velocities, and close to the same powder charges. If anything, the Lapua if overstuffed, will burn more powder, and likely have a shorter barrel life, but we're splitting hairs here. Sounds more like someone drinking koolaid that told you that,lol.