i am in the last stages of getting my custom 260 done well my gun smith should have all of the parts next week beside the brake i have to order that. but anyway all of that is out of my hands now. i need to start looking a reloading supplies. mainly powder. the guy i bought my stock from shoots competitions out to 600 yards i think, anyway he told me he uses 42 grains of h1000 with a 139 bullet out of his 30" barrel in his 260 . now my barrel will only be 26"- 28" #6 Brux then a muzzle brake will be added probably a pain killer from Kirby. from some of you that shoot 260 calibers and reloads do you have any pet loads that you would share??? my barrel will be 1-8 twist. and hope to shoot 139 lapua's. not sure why just have read nice things about them. i know i will have to find what my gun likes. but i have lots of different powders to choose from. Besides i like to read what other people are shooting out of their rifles.