Just got into deer shooting and have just received my FAC back with a 0.243 on it. I am within seconds of getting a rifle but am having second thoughts about the calibre I have chosen. I have to get it right because I doubt I will be able to afford another rifle. I want to shoot fallow deer predominantly in a woodland setting, mostly from high seats. Reading the hundreds of posts on this forum, there is loads of calibre/bullet mass related stuff but the comments seem to polarise between small deer - muntjac and roe and red. Fallow are somewhere in the middle. My question is: should I bite the bullet and send the FAC back for a variation to say 0.270, or will the 0.243 be OK for fallow with 100gr bullets? Can I get some feedback on the effectiveness of 0.243 on Fallow specifically. Cheers!