I use a couple banners, and they serve me fine. There's a 6-18x50 on my Hornet, which is entirely satisfactory. The cartridge is only good to 200m or less and barely recoils at all. I have no real need for an expensive scope on this gun. Likewise the 4-12x40 on my 22lr. I have a banner on my 7mm08, but that's only temporary. It works fine, but I don't really trust if for 'serious' hunting work. Likewise, I had one on my 308 for a while, but it got replaced. Generally, I like them fine for 'plinking' guns where accuracy isn't paramount (3-4" 200 yard groups are perfectly acceptable), and neither is it used for critical applications where you might only get one shot - like hunting. For long range varmint rigs, I equip more expensive glass with high magnification, AO and mildots. For hunting guns I usually get a fixed objective lower power variable scope, like a Leupy VX2 or Burris Fullfield.
So - just IMHO - a banner is perfectly acceptable for your 305, if (as I assume is the case) you're not looking for: long range shooting - >300yds; bug-hole accuracy; or hunting.