With its new design it makes full power but is more docile than stouter springs. Can be spaced up for full power. Works great with the drop in Hornet seals and even correctly sized factory seals.
38 x .125" wire- ID- .543"
Fits Mksmn 55-70 break barrels as well. HW 85,95,77,97,60,61, R9,10,11 etc.
