I just returned from Namibia from a plainsgame hunt. I cleaned my rifles last night and found something disturbing. A little background info on one of the rifles. The 338 RUM in question here is a custom made rifle, with a Krieger barrel. I had the rifle made specifically for this hunt. The rifle is a .5 moa rifle with good bullets, and has only had about 200 rounds down the barrel. Here is the problem. When patching out the bore after brushing, I found a loose spot in the bore. The spot seems to be between .5 and 1 inch roughly 3-4" from the muzzle. When pushing the patch down the bore the patch is tight then the rod slips forward the above distance then feels like it engages the lands again. I used two different cleaning rods to make shure it was not some issue with the ball bearings in the handle making it feel like a loose spot...nope its in the bore. I have not shot the rifle at a target since the first day of the hunt. What is the oppinion here? What could have caused this? I only fired this rifle 5 time on the hunt and never had an extraction problem which I would think would be caused if there was some sort of obstruction in the barrel that could have caused this. I am baffled, I wish I had a bore scope. I have also Mic'd the barrel around the loose spot looking for a bulge...nothing. I Have ran no less than 8 patches down the bore of this rilfe every 20 rounds for 200 rounds over the last 4 months, point is I know what the bore feels like. The loose spot might as well be a hole in the side of the barrel. Any Ideas, obviously the barrel is ruined I am just curious how this could have happened.