I'm not even done with this years season and I'm already looking to next years projects, I want to build my first full on custom high performance rifle but I don't quite know what to chamber it in. I'm set on building on the Raptor receiver, Brux barrel with a 4-port Muscle Brake, Manners stock with Seekin bottom metal. Caliber in 338 or 375 though I kinda lean towards the 338, I've been a minimalist in the past but after shooting a 338 RUM I put together for my buddy I can hardly put it down, absolute pleasure to shoot but I want to take it up a notch from that level. I was thinking something like the 338 Lapua Improved or something along those lines, is there a 375 Lapua Improved, Excaliber? What's out there that would fill this receiver?