I've only ever used Federal .243 "power shock" 100 grain whilst stalking roe & muntjac. My usual stockist in Wiltshire claims that due to the "American War Effort" the supply from Federal is sporadic. He suggested NORMA ammunition instead. Does anyone have any experience of using Norma - does it compare with the tried and tested Federal. Should I be bold and spend £31 on a box of 20?!