Have an old rim fire cartridge that has S.A.W. stamped on the head--rim diameter .463--rim thickness .065---brass length 1.152---oval 1.598--bullet diameter .500 plus----looks very much like a 56-50 Spencer or 56-56 Spencer---thought maybe someone here might have an idea as to it's origin!
I own a Savage .223 rifle with a 1:9 twist
Question: What is the heaviest weight bullet that you would use for this firearm?
I purchased some 77 grain bullets for reloading and read on the box after delivery that they should be used only for 1:7 and 1:8 twist rifles. Would that make my 1:9...