Will do. There are a number of quality cartridges based off of the .243: the 6xc, 6slr, 6cm .243AI, etc. I used the .243 30deg Imp by Robert Whitely (http://6mmar.com) with the long throat. David Tubb has a new version of the 115gr DTAC out that has a significant improvement in BC that I'm interested in trying.