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OK, if you are going to re-barrel, why wouldn't you chamber in the Ackley? Better brass life, increased performance and the KOOOL Factor. Some will argue that it's not worth the effort due to the HIGH cost of Ackley dies. This is simply not true. In the 243 and other 308 based cartridges the dies are inexpensive. The standard Lee Collet neck die will work in the 243 AI. The standard seating die (RCBS) will also work with the 243 AI. When it's time to bump the shoulder back a $30 Redding body die in 243 AI is all you need.
I just had my son's Savage 7MM-08 chambered in 7MM-08 AI. Nice, easy on the brass and excellent performance. here are some of my Chrony numbers from a few weeks ago.
160gr Nosler Partitions.
Hunter.
48gr---2705fps
48.5gr-2724
49gr---2766
49.5gr-2797
50gr---2820
50.5gr-2850
51gr---2884
51.5gr-2893
52gr---2894
MRP
47gr---2626
47.5gr-2722
48gr-error
48.5gr-error
49gr-error
49.5gr-error
Replace battery
50gr---2704
50.5gr-2744
51gr---2781
51.5gr-2803
52gr---2833
DP-86
47gr---2667
47.5gr-2710
48gr---2742
48.5gr-2746
49gr---2781
49.5gr-2833
50gr---2843
50.5gr-2869
51gr---2888
51.5gr-2910
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