Originally Posted By: brock2013I would get a 30 30 for a brush gun. Just my opinion
The 7.62 x 39 is very similar to the 30/30 Win. in ballistics. Some guns in 7.62x39 use a .312 bullet, not our common American .308 diameter. Some American guns in 7.62 x 39 were bored for .308 diameter bullets however. You'll wanna check that out before buying or reloading. These calibers are generally considered good to 150 yards or so on deer, assuming adequate accuracy. Hunting loads are not found just anywhere in this caliber, and reloadable brass isn't just anywhere either as most of the ammo you'll find is steel-cased (read fire it one time and let it lay) FMJ military surplus for plinking. There is hunting ammo available [beeep], and reloadable brass if you order it. Bullets and dies too.
The 308 Win. is a more powerful round, and is generally considered sufficiently powerful for deer out to 400 yards or more depending on your loads and minimum energy requirements. It does use a more common .308 diameter bullet, and is a common American, and NATO round for sniping and medium-duty use. It is available just about anywhere ammo is sold, and comes in mil. surplus for cheap plinking, and hunting ammo everywhere. Surplus brass can usually be reloaded, and is readily available in the US. The only negative I can see on the 308 vs. the 7.62 x 39 is more recoil in the 308. And even that is not usually objectionable to most shooters. A 308 will be able to reach out for that occasional longer shot.
Without a scope, the improved ballistics of a rifle over a shotgun are somewhat lost due to restricted accuracy/aiming ability. For shots to a 100 yards or so, as shotgun is sufficient, but accuracy would be better with a rifle, and better still with a scope site, even a low power one. Aim small, miss small.
Just my opinions.