I am looking to get some opinions on a scope for my 7mm mag. It is primarily going to be used for hunting. And I am on a pretty tight budget. $500-600. I have looked at numerous scopes over the last couple of weeks. All this has done is confuse me. Some had adjustable objectives (which I don't really understand). I have used 3-9x40 scopes for the last 30 years. I would prefer a higher power scope for this rifle but, I am very hesitant to get one. Due to all of them having this adjustable objective. Some help would be greatly appreciated.