Just recently purchased a Kimber Montana 308 and have problems with getting the correct load. I have shot several bullet types and two different recommended powders and various powder loads. I spoke to a Kimber rep and was not too successful with getting any info from him. Basically, I was told anything other than factory loads would void the warranty. He did add that the barrel needs to be completey cold before the next round could be fired. Is this typical for getting the accuracy I expect?. Also, if there are any loads recommended, I would appreciate any feedback.