Weaver Grand Slam... no question, no competition in the 300 dollar range, whatsoever.
The turrets are the Micro-trac, which track as accurately as any scope at any price (including the 3000+ dollar scopes)...
Glass is good, and they have glass on par with the Leupold VX3s.
You don't need 18X for hunting MOA sized zones... get a Grand Slam in 3 to 10 power and it will not need to be replaced in the future. Natchez and Midway generally have the 3 to 10x Grand Slams for 300 dollars.
Three X will be much better for woods hunting and closer ranges than would 6x be... six power is too much for close in shots, in most cases anyway.
Most folks tend to use too much magnification for the purpose at hand. Even varmint rifles don't generally need more than 20x at the most (and that's shooting little prairie dogs).
You can quarter a bowling pin at 1000 yards with 10x... so that's more than plenty.
...the longest shot I've made on a groundhog was just under 800 yards with a Bushnell fixed 10x Elite.