Welcome to both you guys. The 7mm-08 is not a lot unlike the 7x57. I used to shoot 154 gr bullets in my 7x57's because they shot so well. But I think if I could have got the 139/140 gr bullets to shoot better, I'd have used them more.
I'd stick with whatever you are shooting now. The 7mm - 08 is plenty of rifle for antelope with any hunting bullet. Accuracy and knowing the rifle and how it shoots are far more important than anything.
Federal Premium 140 grain with Nosler Balistic Tips or Winchester Supreme with 140 grain Balistic Silvertips. Either one of these should be very accurate, give you great long range performance, and be just the right type of bullet to take down your 'lope. Have a great hunt!
Here is an inexpenive and effective deer feeder I made recently.
No batteries to go dead, no hoisting it up in the tree, plenty of capacity, very easy to fill - so far, I love it.
I have made two of these and they are easy to build.
An empty 55 gallon drum, some 2x4's, some PVC tubing and fittings, a little bit of hardware and some paint - and you are ready to go.
I designed it so you can stand on the lower rung and fill it - the top is about 6.5 feet above the ground.
It holds about 375...