Blue Box 270. I have shot a lot of it and none of my hand loads ever give better groups. It always runs 3070 in my 22.75" tubes. Have shot impala, warthogs, waterbuck, and kudu. No issues. Should give up on the work of hand loads but still do it.
About to start to using 243/80 and will report. Never have had a 243. About to buy.
Last edited by RinB; 02/24/13. Reason: Spelling and grammar