Too you all,
Thanks so much for your help. I found that my scope was faulty. I also used a slower powder, IMR4350. I will try some of the other suggestions later. Putting a different scope on made a big difference. Thanks again.

Which Weatherby do you have and how well is it doing? Ron

Farmboy, What powder and bullet are you using and how small are your groups? Are you still using the 139 Interbond, If your not getting under 1/2" for 5 shots fired SLOWLY, send me an e-mail, and I'll give you my recipe for a dynamite load. Jay

Sorry about slow response. I have been shooting and shooting. I have a mark 5 syn. with a 26" barrel. I am fast coming to the conclusion that the gun hates Hornady bullets. A friend of mine and I worked on the rifle for almost a day. We found two things. We tried a different scope and that helped. Something wrong with the first one. We then got to thinking maybe a slow burning powder would be the ticket. Hornady better but didn't cut it. We then tried some Nosler 150 ballistic and bingo. The slower powder and different bullet. Now the rifle is cutting holes at 100 yards. Much happier. Thanks again to you all.
farmboy9

Farmboy,
What Make/model was the bad scope?

Thanks.