danowak-I shoot the .250 SST which is the same bullet as the shockwave. My best load is 110gr 777/2f.Try the Dead centers at 100gr,which seems to be a good load for most pointy type bullets.Work up 5 or 10 grains at a time until groups start to open up.All MZ's are a little different. You will reach the point of diminishing returns as far as performance. Some bullets will fragment on impact when pushed too fast. Just have fun shooting and find the load that best suits you and yor rifle. Have fun,but be aware,this sport can be very addictive.

Charlie