After all the ideas of how to easily tune a RAW HM1000x, this is the current setup which turns out to be fairly simple. You can either set the OEM regulator or as in my case a HUMA adjustable regulator to as high a BAR setting as you wish, in my case 195 BAR.
I will control the delivered air pressure to the rifle via an external dual air pressure regulator. To adjust the hammer spring allowing large or small adjustments I will remove the cheek pad which only requires loosening one bolt. To reposition the cheek pad I simply place a caliper between the cheek pad and stock at the distance it was at prior to removal.
Tethering the RAW HM1000x this way allows adjusting air pressure without the need to remove an air bottle to make adjustments to the HUMA adjustable regulator, or having to remove the OEM regulator to make the adjustment.
I’ve noted the pressure reading differential between the external dual air regulator and the newly installed Sekhmet digital pressure gauge which is 1.5 BAR, not much.
Initial tuning will be with a wide range of projectiles, but first I’ll test .30 caliber slugs to see if they shoot well out of my rifle at 100 yards and at what pressure and hammer spring settings. If I can find a setup, next is to note the provided air pressure and hammer spring setting and replace the tethering adapters with either regulator adjusting them to match the indicated air pressure on the Sekhmet gauge and comparing the muzzle velocity of the projectile to when the rifle was tethered. If close I can fine tune the hammer spring setting or if needed to make minor regulator adjustments.
Tethering allows me to make slightly coarser pressure adjustments quickly testing a wide range of projectiles and pellets. For anyone interested in the adapter parts, here they are:
You need the following HUMA adapters + Extra RAW O-rings
● 1/8" BSP male to 1/4" BSP male adaptor - https://huma-air.com/1-8-bsp-male-to-1-4-bsp-male-adaptor/
● Foster Male to G1/8" BSP Female Adaptor - https://huma-air.com/foster-male-to-g1-8-bsp-female-adaptor/
● Rubber Steel Washer G1/8 (3 Pack Bonded Seals) - https://huma-air.com/rubber-steel-washer-g1-8-bonded-seal/
● Fat O-rings from RAW, part number #R-AC-OR-00006 Bottle "O" rings (pack of 5)
Make sure you insert the bonded seal between male and female adapters as shown as well as the fat O-ring on the male to male adapter that screws into the action block.
I will control the delivered air pressure to the rifle via an external dual air pressure regulator. To adjust the hammer spring allowing large or small adjustments I will remove the cheek pad which only requires loosening one bolt. To reposition the cheek pad I simply place a caliper between the cheek pad and stock at the distance it was at prior to removal.
Tethering the RAW HM1000x this way allows adjusting air pressure without the need to remove an air bottle to make adjustments to the HUMA adjustable regulator, or having to remove the OEM regulator to make the adjustment.
I’ve noted the pressure reading differential between the external dual air regulator and the newly installed Sekhmet digital pressure gauge which is 1.5 BAR, not much.
Initial tuning will be with a wide range of projectiles, but first I’ll test .30 caliber slugs to see if they shoot well out of my rifle at 100 yards and at what pressure and hammer spring settings. If I can find a setup, next is to note the provided air pressure and hammer spring setting and replace the tethering adapters with either regulator adjusting them to match the indicated air pressure on the Sekhmet gauge and comparing the muzzle velocity of the projectile to when the rifle was tethered. If close I can fine tune the hammer spring setting or if needed to make minor regulator adjustments.
Tethering allows me to make slightly coarser pressure adjustments quickly testing a wide range of projectiles and pellets. For anyone interested in the adapter parts, here they are:
You need the following HUMA adapters + Extra RAW O-rings
● 1/8" BSP male to 1/4" BSP male adaptor - https://huma-air.com/1-8-bsp-male-to-1-4-bsp-male-adaptor/
● Foster Male to G1/8" BSP Female Adaptor - https://huma-air.com/foster-male-to-g1-8-bsp-female-adaptor/
● Rubber Steel Washer G1/8 (3 Pack Bonded Seals) - https://huma-air.com/rubber-steel-washer-g1-8-bonded-seal/
● Fat O-rings from RAW, part number #R-AC-OR-00006 Bottle "O" rings (pack of 5)
Make sure you insert the bonded seal between male and female adapters as shown as well as the fat O-ring on the male to male adapter that screws into the action block.