Re: 300 RUM and VLD's velocity ?
It is not surprising that your load is going that slow. I think you have some case capacity to get some more powder in there.
Also, one should not put much credence into 'internet velocities'. My 300RUM shoots the 208/210 grain bullets about 3150fps with 91grains of Retumbo. If I believed what was on the internet, I should have been able to push them at 3300+
If you want to shoot the 185grain bullets (and I would recommend you shoot an even heavier bullet), you should consider changing to Retumbo and more than 88 grains of it.
I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!