I have had excellent luck with the 180TTSX and 97.5 grs Retumbo, Federal 215 primer overall length set to 3.60''.
One rifle is custom Christensen Arms 300 ultra with 26'' barrel, the other is a Browning left hand stainless, re-barrelled to 300 RUM also sporting a 26''Carbon pipe.
Both rifleswill shoot this exact load repeatedly into less than .5'' groups at 100 yards.
averages 3335fps, while the rebarrelled Browning runs 3290fps.
Another friend is waiting for his new Christensen rifle to show up so we can try this load in the new gun.