I clean on a schedule. Every 50 rounds in the field with Butches Bore Shine to mostly remove carbon and a bit of the copper. And every night I de-copper using a Boretech Eliminator. But I do the same on my other .204 and .224 calibers. I haven't found the 204 Ruger to be that bad on fouling, but that depends a lot on your choice of powder and how you load.Generally how many shots are you guys getting between cleanings with you 204