Hi I would like to get started in long range shooting of deer (400-500 yd), well thats long for me. I am a little stuck on which round to use as I am very recoil shy. I used to have a 7mm08 Ruger ultra light for close work and hated it. At the moment I am using a 22-250 for varments and that is fine. I was thinking of either 6mm like 243 or 6.5mm. What do you suggest?