Since your on a fixed income and already have a 300 Win mag and 300 Wby mag, I don't see the point in this. Both rifles you have now, will easily do what you want. And if the recoil is starting to be an issue, just get some H4895 and 130 or 150 gr bullets and make up a reduce recoil load in either caliber. A reduced recoil load of 3000 fps will still shoot flat enough and hit hard enough to do what you want.
Rob