Re: Remington African Plains Rifle .300 RUM
If you shoot for "fun", stay with the 6mm. If you shoot for "fur", go with the .300.
You probably know this, but the APR is a hunting rifle----unless you enjoy getting knocked around by recoil, you probably won't like shooting it very much. The laminated stock is very stiff and transmits all the recoil to the shooter.
The Sendero is more pleasant to shoot, due to slightly higher weight and the stock absorbs just a bit of the recoil.
I have experience with several 300 RUM Senderos as well as the 338 RUM Sendero, and several 300 RUM and 338 RUM hunting weight rifles with synthetic and wood stocks-----the Senderos are somewhat more comfortable to shoot--especially from a rest.