I'm not a long range shooter, about 300 yards is it but I've had very good results with X-Terminator using 40 to 55 gr bullets and the 63 gr Sierra SMPs with max loads in several 223s.. Availability has been better lately but a couple of years back not so good. I was told by Western Powder Personnel that it's the same powder as Acc 2230 but Lyman's 49th loading manual gives completely different loading data for the two.
The only manual I trust less than Lyman's is the Lee manual. Western Powder's load data is identical for XTerminator and 2230; they are their powders so I go with that. Actual use bears that out as well.
