Laser Bore Sighter for .243/.308/.7-08. New in unopened package. Includes $15.00 coupon good at Optics Planet and their affiliated stores through August 31, 2013. I bought a model that takes AAA batteries and decided to keep that one. I paid $35.08 with shipping. Asking $30 and I'll pay...

At the range today, I only put 10 rounds through my M1A. Should I go ahead and clean the bore (solvent and oil)? I hear that more damage is caused by overcleaning, but I've also heard that I should clean the bore and regrease after each trip to the range. How often should i clean the bore...