The fine art of fine tuning.
We of Shadetree Engineering & Accuracy, working in conjunction with the late Shelley Davidson, offer a barrel vibration-tuning device. The installed tuner provides a means of adjusting a weight to match bullet exit to barrel vibration.

This tuner weighs 6.4 ounces and your barrel will need to be threaded to .900-32TPI per the included instructions.

$69.99 plus shipping (estimated shipping: $7.50 - continental USA)