Sep 05, 2020 · Compare barrel life between the 6.5 G and the 6MM ARC.. just food for thought. If you get a 6.5G or ARC, be sure to buy a quality bolt. The thin walls at the lugs ( surrounding the case head rim ) have kind of concerned me.
I just finished my first 6mm Dasher barrel, it was a Lilja, 28" medium palma chambered with a Lapua no-turn neck and a .126 freebore. It went to barrel heaven with about 2300 rounds, they were almost all fired long range slow fire prone with 108 Grain Berger's and 32.5 grains of Norma 203B with either Tula 556M or BR4 primers.
For those reasons, flat shooting, medium bore, high velocity (up to a point), and mild recoiling cartridges with a long barrel life have a big advantage in these competitions. Gardner realized that the 6mm Creedmoor fit the bill perfectly for PRS use, so he modified an AR-10 to use the new cartridge.