I had a Mini-30 that would shoot 2 to 3" groups at 100 yds with ammo it liked. I have fired a friend's Mini-30 and it shoots the same. I've also had and fired several Mini-14's that had the same level of accuracy. I get so sick and tired of people saying Mini's aren't accurate. All you guys that say the Mini's aren't accurate either can't shoot worth a damn, or you've never even fired one and you're just recycling something you read on the 'net. Or maybe your standards are just too high for what is essentially a lightweight sporting autoloader. For what it is, I think 2 to 3" groups at 100 yds is plenty good.
Nailcreek, the Mini-30 is a decent choice for 100 yd deer hunting. I shot 2 deer with mine before I had to sell it. I used the Winchester 123 gr Power Points. They worked well and were decently accurate. You could bed it. In my experience, bedding won't necessarily improve accuracy, but it will reduce the likelyhood of 'fliers'. For iron sights, I'm assuming you have the older version with the flip up rear sight, correct? If so
www.accuracysystemsinc.com/ has a replacement rear sight you'll probably like. HTH