I had a .270 custom stocked for my Marine SIL during his first tour in Iraq. I too find the 140 Accubond to be the best choice for mule deer/elk. I don't have my notes handy for that rifle, but I want to say I used H4831. Anyhow, it is a very streamlined bullet, and accurate too.
I hunted antelope my first time in Laramie, WY, back in '93. I had a Remington Model 700 Mountain Rifle in .280 ( reamed out to the Ackley Improved) and was shooting the Nosler 150 BT. It had a Leupold Compact ( now they call it the Ultralight) 3x9. It was Jim Dandy chasing elk up in the Uintahs, but that prairie wind blew "me" around terribly. I missed 4 different bucks in one day, ha. I just could not tell what the wind was doing "where the buck was". I call that area the "short grass" prairies, as I could not see any wind indicators. However, I did slip up to a small group that was about 250yds the other side of a snow fence. I wrapped myself and the rifle all up in that fence, and I was rock steady. It just so happened I got a tail wind from me to him, my first and only buck antelope, 15" with deep hooks. I have shot several antelope does since, and I used heavier rifles ( in weight) but not what I would call a beanfield rifle. I like standard sporter weight rifle/3x9 or so, which holds steady enough for me. I did like the way a real heavy rifle feels off bags, and it allowed me to take advatage of a higher power magnification in scope. Hunting from a blind, in a known area, say a lease, and who is where, allows one to "scope out" deer instead of using binocs. Picking a hole in the brush, judging the sex/horns,etc, shooting pigs behind the ear, is a benefit to what I call the "beanfield" rifle. I just don't get to do that here in Utah, so I got into the habit of using binocs all the time, but I didn't even own a pair in Texas!
Have fun man!