When I hunt with my 30-30 Win I use a twilight peep while on stand.

http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=380255&t=11082005

But when I'm dogging I take it out and just use the big ring for faster targetacquisition. It is usually very close range and fast shooting when dogging compared to being on watch.