I was wondering, is there a general rule or thoughts on bore diameter vs bullet diameter for double rifles? Seems like you might like to limit barrel distortion a keep your barrels together longer? I have an "I" bore 8x75R double rifle that slugs to .306/.316" with a 1:9.5" twist rate. I am wondering if people would select .316 or .318 for load development and regulation?
Rick Hill
Rick Hill