Snowpeak Pp750 177 late to the party but need help

[Zorbar]

Finally found pp750 in 177 but I think it’s Canadian version as the brass valve hole is so tiny. Enlarged that hole with 1/16 drill and no other mods other than cranking the reg CCW to 2 threads above flush. Also maxing the hammer spring screw and backing off 1.5 turns. Only getting 570fps max 600fps about 7.6 fpe with 10.3gr pellets. What is going on? Is the reg not working properly? I tired adjust the HST but no change in velocity much. Does it mean I have to drill the hole where the reg screws into. Where it’s held by 4 long screws? Also should I also drill the 2 holes in the barrel tp? I watched the YouTube vid but found nothing about the 177.
Or should I buy a huma reg? hope someone can help.

 

[RabbitofCaerbannog]

Finally found pp750 in 177 but I think it’s Canadian version as the brass valve hole is so tiny. Enlarged that hole with 1/16 drill and no other mods other than cranking the reg CCW to 2 threads above flush. Also maxing the hammer spring screw and backing off 1.5 turns. Only getting 570fps max 600fps about 7.6 fpe with 10.3gr pellets. What is going on? Is the reg not working properly? I tired adjust the HST but no change in velocity much. Does it mean I have to drill the hole where the reg screws into. Where it’s held by 4 long screws? Also should I also drill the 2 holes in the barrel tp? I watched the YouTube vid but found nothing about the 177.
Or should I buy a huma reg? hope someone can help.

what about the TP hole in the barrel? and yes, the part that connects the tube to the gun held on by 4 screws needs to be drilled.

simply cranking the reg up may be more pressure than you think. is the hammer strike just a dull "tink"

 

[WoodWelder]

I'm private messaging you right now!