Free: Contests & Raffles.
Maybe try one of those barrel resonators that controls the vibrations.
Stevo,Try seating the bullet deeper in the case. My Kimber Montana will only group with the bullet at a certain depth. Using 165gr Partitions and Accubonds it groups awesome using H4350, and w760 a close second. Sunday at the range I went with a 180gr E-tip and IMR7828SSC. I'm getting 1/2" groups at 100yds. Using the same bullets and powders if the bullet is not seated at a certain depth. The groups go to *censored*t.. Weird. Finicky little bitch.
I'm HawkenBob's bitch... he's busy with the goat and some velcro gloves right now... I guess I can't satisfy him like I used to. So, I'll come on here and defend him... since he's not smart enough to do it himself.
Steveo, Make sure if all else fails to seat that bullet deeper. I tried every load bullet, powder combo out there. Wasn't until the bullet went deeper in the case that it became a dream rifle. shoot everything I try now awesome.