Yall seem to be forgetting a crucial step in scope mounting. I cannot remember how many scopes I've seen with "ring marks". These are caused by3 things-ring misalignment and/or neglecting to lap steel rings in(exception being burris sig rings with plastic inserts),or overtightening. If you go to a basspro or d**ks,they won't do the same job that a gunsmith or knowledgeable tinkerer will. You're spending a lot of money to waste by damaging scope by improper mounting. You CAN buy scope lapping equipment at midway.brownells and other places. All it takes is a 1" steel bar with handle welded on and lapping compound to lap scope rings and a simple double pointer to assure the rings are aligned perfectly. Remember-ring marks are not only uneccesary-they are also indication of scope damage.
What Stalking Bear said.
Alaser bore sighter is one of the best things i ever bought. It has never failed to get me on the target at 25 yards and usually at 50 yards. My laser bore sighting is done in the house. The target isa 1" target paster on the wall 25 feet away. Saves a lot of time and ammo too.