Dropped my regulator to 1900ish. Gun shot 13.43 JSBs at 750. Took my hammer spring all the way in and no effect. I backed hammer spring back out, 750fps. Turned regulator up to 15mpa (2175 psi). Gun got 30 shots from 3300psi to 2175psi. Great groups, 777fps average, 9fps spread. I will either...