This method I use might be pretty well accepted amongst the ounce scrapping sheep hunters too. Since a couple of my rifles don't come with open sights.....I didnt want to bring a spare scope along as it was too bulky (even if it was a 1x fixed scope). Instead......I sighted my burris speedot for whatever load and rifle that i'm using and unmounted it. The thing weighs like 1.3 ounces!! I remounted it to see if it kept zero and BAM....right on the money! If ur scope ever goes down folks.....and you dont have open sights....just pull this thing out of the smallest pocket of your pack and continue on with that multi thousand dollar sheep hunt. http://swfa.com/Burris-1x-FastFire-R...ght-P7934.aspx
Between two rifles......it has kept it's set zero when re-attached. Good for 300 yd. hits.....accurately.