Jeff P .078 transfer port for my Disco .177

Jeff P .078 transfer port for my Disco .177

Joined: June 12th, 2011, 3:48 pm

April 11th, 2013, 1:30 am #1

Jeff P made a .078" transfer port for my .177 Discovery and I tried it out today. I was looking to get around 12 FtLbs of energy from it and extend my shot count with a 2000 fill down to 1000 psi. I do have a hammer spring adjustment screw mod installed and with it adjusted to zero I was getting about 15 ft lbs and around 25 good shots. After I installed the tp that Jeff made this is my shot string with CPHPs:
825
814
820
820
815
823
827
817
823
826
812
822
814
821
812
814
819
816
810
822
811
816
815
808
812
805
809
807
806
807
802
799
793
794
794
790
788
776
783
770
Thats 40 shots from a 2000 fill to 1100. Avg 809. 11.48ftlbs. thats 35 shots within 4% of the high. Accuracy was about dime sized group at 15yds.
Thats just about what I was looking for and I will see what it does when I increase the hammer spring tension and find out my power on the higher end. The gun is quieter but was not very loud to begin with a TKO muzzle brake on. Gotta give a great big thanks to Jeff P for making this port for me.
Last edited by zaphod621 on April 11th, 2013, 1:35 am, edited 1 time in total.
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Joined: February 16th, 2009, 8:33 pm

April 16th, 2013, 9:10 pm #2

Jeff's a great guy - been very helpful to me with all my Marauder/TX200 craziness I've been through. Hope to meet him in person one day!

-Casey

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CASA Member - California Airgun Shooters Association: http://socasa.org
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