I read an article in Precision Shooting a few years back, Where they cut off 1" at a time. You should find it ,and read it, before you do it all over again.
Come shoot with us. We are in south Georgia. My brother sells Eley and know more than most about ammo. You can go to some matches in north Georgia on Thursday night. Call and I will get you in touch with them. Rod Collins 229-942-5999