been searching here and on other sites in an old post her i put that my mcgowen 8t 26 223 barrel was short throated and would not shoot 75-80 bullets out of it with out seating the heads DEEP in the case. well my gunsmith said he can legthen the throat for 20.00 i just need to give him a dumm cartridge to use . anyone has a cartridge depth they want to share for 80 gr amax bullets i know i can use the book coal just figured i would see what ya'll use and make one up . this rifle will be used for f t/r 300 yd and tactical out to 1000 yds so i want to shoot 80gr amax from it and might play with some 75's i have left over but 80 gr is the primary load.