My .45lc brass brass lasts forever but the .45lc nickel will split. I’ll usually find a couple split cases after a 60 rd cas match. But I’ve got nickel brass thats so old it’s lost so much plating it looks like brass. I use brass .45 in my Marlins and ubertis and the nickel in my sa and da revolvers. Everything gets full length sized, I use the same rcbs sizer die for my .45 schofield and long colt brass. I use 200 gr rnfp in the revolvers and 225-250 gr in the rifles.