[HPBTMTCH]

Scooterman, moly works well when trying to tell how far out to seat the bullet into the lands, much better than a magic marker. Seat 3 rounds so you can just see a mark on them when you pull them out of the chamber, then if you have a way to measure the olgive of the bullets, seat the next group a couple thousanths farther out, and see if it makes a difference, keep in mind, the farther the bullet is jammed, the load may make more pressure. If the bullet is jammed into the lands real hard, and is seated long, it may pull out of the case when you remove it, so either use an empty unprimed case, or at least hold the muzzle up to avoid having powder everywhere. Neck tension and moly is also an issue, if you don`t have a bushing die set, take the .204 decapping plug off and use a .17 caliber, or deprime the case and then resize it with the stem removed, and see if that helps. Are you cleaning moly correctly? Use a couple patches of kroil, followed by a patch of JB paste short stroked though the bore, then 2 more kroil patches, and then a few dry patches. The patch will still be a little black, but you are`nt supposed to remove all the moly, unless you see there`s fowling underneath. Now you mentioned you shoot a lot, heat is bad. If the barrel feels warm to the touch, the groups are likely to start going away. Are the first 2 or 3 rounds from a cold barrel a good group, and then things go down hill ? Not very many rifles i know of shoot well if the barrel is hot. If you can`t hold on to the barrel with your bare hand, you are doing a lot of damage, and you need to quit for a while. I run compressed air through the bore, (as long as it does`nt have moisture in it), and wrap it with a wet towl if I`m in a REAL hurry. But it`s better to do somthing else for a while and let it cool on it`s own.