Re: velocity to low
You can't really use bullet weight as an indicator, of where you might be at as far as appropriate powder charge is concerned. Take a 160 Nosler Partition, and a 180 Berger Hyrbrid. The listed max charge for the Hybrid with Retumbo is 1.3gr higher than for the Partition in the Hodgdon manual. Why? it's due to differences in bullet construction and material.
Also I would be very care full about listed loads. If I tried to use the Max load from the Hodgdon manual my case would last about 2 rnds, where as I'm running 0.2gr above Bergers listed max and still 0.8gr below Hodgdons max.
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.