You got a point. but the good news is the 300RUM has so much freebore, it is a moot issue. Neither bullet I find needs much care in working up a load (as far as overpressure). Only bullets I worry about is TBBC, Failsafes, X, and XLC's. Both your bullets have a decent amount of margin. Just don't get fancy and try 2 or 3 grains over thier limits. Thier max's for 300RUM I find are quite reasonable.

Here is where I start loading for a bullet like the accubond. I load it long as possible to fit in my gun's magizine. I try that until I find something promising, and adjust .02" low and .02 high.