Leshiy ??

I have been chronographing my 25cal leashy and with the 350 barrel I can only get about 730 to 745 ffp now with the 250 barrel it's not that big of a change it's 720 to 730 I have the Huma reg in my one and I am having problems getting the 800ffp all videos show I am shooting jsb mark 2 I have set my reg to 110 al the way up to 135 and seems the higher reg goes it makes a louder bang but not much diff in ffp so am still learning it's tuff to set I am disappointed on how hard it is to tune I watched edgun West videos and I can't get what he says or what any videos say I should get when I finish my tune I will up date you. John

I gained 70 fps with my .22 using 18.1gr JSB's. The 350mm barrel is much more quiet.