How much do you plan to shoot this gun! 100 brass of any make will give you 5-600 rounds. Seems a shame to go thru the expense of rebarreling a good custom before its time....just me!I've got a full custom rifle in 7WSM. It has a 25" Bartlein 3b with an 8.5" twist. The Borden action is (I believe) a magnum face short action. Never having the option of quality brass (without converting from other WSM cartridges) has grown tiresome. What can I rechamber the barrel to that would have high quality brass available?