300 RUM Issues...
I finally had the opportunity to get out and verify my drops this weekend on my 300 RUM. I am loading up 92.5 grains of Retumbo for a 200gr Accubond, COL of 3.587" (to fit my magazine). I initially got pressure signs at 93 grains when loading these up (half moon on the case head), so I backed off a half grain.
My issue after shooting this weekend is that it looks like this load is only pushing approximately 2,860 fps. According to Hodgdon, their minimum load of 89 grains produced over 2,900 fps (with a COL of 3.60") and the majority of load data I have seen get people well over 3,000 fps when going over 91-92 grains.
Is there something I could be missing here? Should I just try loading up some other powder? I could stick with this load as is, but I don't really feel like it is taking advantage of the RUM's capability. By the way, I was able to shoot at 700 and 900 yards to verify these drops. Any advice is appreciated!