Hi, I have an older Remington 700 BDL, 30-06. Bought it used. It, shoots 2" or less groups at 100yrds. I want better accuracy for long range hunting, 600-800 yards. I'm in the process of measuring the chamber for reloading. I diassembled a Remington core Loct 180gr factory round and slid the bullet just into the case end, chambered the round and gentle ejected. I was surprised to discover a 0.170" distance between the rifling lands and the seating grove on the bullet. I repeated the measurement test with Hornaday measuring equipment, Berger and Sierra bullets. The bullets barly slid into the case, about .050". Not enough to create a safe reload. Has anyone seen such a gap between bullet and rifling lands? What should I do?