You are correct. Any dispersion would be the result of the individual, not his ransom rest. The question is whether the Gripper helps the shooter to get tighter groups.
For 9mm, having all holes touching the first hole means no more than 27mm group. At 10 yards that dispersion is about 90mm or 3.6 inches. The test isn't as easy as it sounds. But if your basic skills level is high enough that 3 yards is just one ragged hole, increase distance or put a time limit on the string.
For 9mm, having all holes touching the first hole means no more than 27mm group. At 10 yards that dispersion is about 90mm or 3.6 inches. The test isn't as easy as it sounds. But if your basic skills level is high enough that 3 yards is just one ragged hole, increase distance or put a time limit on the string.