This little gem tops my list because I used it almost exclusively as my deer hunting rifle for about two decades. Although this model is no longer being manufactured, I just had to include it because of my long and pleasant history with this rifle. With its handy carbine length and the hard-hitting 44 Rem Mag cartridge, this is an excellent gun for brush use at ranges out to 100 yards or so.
Remington semi-autos are probably the most popular big game rifles of their kind. Long the most affordable semi-auto deer rifle when it comes to high-powered cartridges, they have held their ground through various Models such as the 74, 740, 742, and 7400. While I'm not a big fan of Remington centerfire autoloaders, a lot of hunters are, and they have taken a lot of game over the years.
3. Browning BAR
Since its introduction in 1967, the Browning Automatic Rifle (BAR) has set the standard for autoloading centerfire hunting rifles. Known for excellent accuracy and dependability, the BAR also lives up to Browning's reputation for high quality and usability. For decades, it was the only commercial auto chambered for magnum cartridges. Long Trac and Short Trac versions signify a newer generation rifle, which bears little resemblance to the original. The BAR is available in calibers from 243 through 338 Win Mag.
I own an older Belgian-made model in 30-06, which has been used to make a clean head shot on a deer at 100 yards.
When Ruger discontinued the Model 44 in 1986, it left a vacuum in the rifle world. No rifle compared with the Model 44 Carbine as a fast, hard-hitting brush gun. Fourteen years later, Ruger again produced a semi-auto carbine in 44 Rem Mag, though of an entirely new design. Similar in looks and size, the action is different and not as scope-friendly, but it will hit 'em just as hard. Sadly, the model 99 was discontinued in 2007.
5. Benelli R1
The Benelli R1 semi-automatic rifle was introduced in 2003. Benelli is a respected name, well-known for their excellent autoloading shotguns. Reviews of this odd-looking rifle sounded promising. The R1 is available in 30-06, 300 Win Mag, and 338 Win Mag. Tactical versions in 5.56x45mm NATO also listed in 2013.