I built a 260 off of a Win 300 mag LA a while ago. Mounted it to a SSS stock with a Shilen barrel I got off of Jim Briggs at NSS. It's was difficult to tune for a while there, trying many different powders and bullets. Finally stabilized on H4350 and both 120 and 140g SMK's. Well this morning, everything came together. I had it benched on a rest and rear bag. I must have done something right because I finally achieved the holy grail - I put three shots into the same hole! I've come close before, but this morning for whatever reason, it all fell into place. I knew that if I shot 37,525,215 three shot groups eventually the law of averages whould finally work in my favor! Just wanted to brag as it's never happened before. Now the problem is finding H4350 powder - tried 6 LGS's and not one had any! ****.....