Bullet seating is important for reasons of safety as well as accuracy. Are you swabbing between shots? Triple Se7en produces a crud ring and sometimes it feels like you have seated the projectile but in reality you have reached the crud ring.

I also have a Black Diamond XR and I can not tell you what a great shooting rifle it is. My rifle is scoped but at 100 yards it can and does shoot impressive groups...



I note you are using XTP's are these in a T/C mag express sabot with the 240 grain XTP? I shoot them with 100 grains and get excellent groups but they fall apart after 75 yards for some reason. It is like the bullet does not want to group further then that.

I have had excellent luck with the 460 grain No Excuses Conicals. I also have great luck with the Buffalo Bullet 375 grain SSB sabot combination and 100 grains of Goex FFFg. Also the 250 grain shockwaves with 100 grains of Goex FFFg shoot excellent. In that above picture of a 3"X5" index card, you will note a smaller hole to the right with a larger hole almost on top of it. I was hunting in the rain that morning and wanted to test the rifle, so I shot a 250 grain Shockwave first at the target then tried some of the No Excuses Conicals.....This is off a set of shooting sticks.

If your rifle is scoped it should be shooting under a 2" group at 100 yards. If it is open sights, I still would not be happy unless it was shooting a 3"-4" group or better. I shot the above group off shooting sticks. When I get the bench rest out and some Triple Se7en powder with those conicals it will do a lot better then that....

I would suggest marking the ramrod and make sure you reach that mark every time. Also swab between shots. I use a mixture of 50/50 isopropyl alcohol and car windshield washer fluid. I run two wet patches and then two dry ones when sighting in the rifle. Also try some other bullets. Some people are having great luck in their Diamonds shooting Powerbelts of all things. I guess it depends on the bore of the rifle...