So I wanted to get the word out to many in the airgun community so I posted in PCP Airguns and also am providing a link here in 'Big Bore Airguns' to the original discussion on GTA where there are drawings and technical information about the barrels and why 7mm/.284 might be a good caliber to look at.
the GTA link https://www.gatewaytoairguns.org/GTA/index.php?topic=165806.0
the AGN main thread link https://www.airgunnation.com/topic/theres-a-new-7mm-284-18-twist-barrel-available-for-airguns/
the GTA link https://www.gatewaytoairguns.org/GTA/index.php?topic=165806.0
the AGN main thread link https://www.airgunnation.com/topic/theres-a-new-7mm-284-18-twist-barrel-available-for-airguns/