Thank you for your feedback. Manufacturing tolerances can vary among rifles, and this adjustable lever spring kit may require individual fitting. However, it should not interfere with the proper operation of the lifter. We recommend contacting us before removing a significant amount of material so we can confirm compatibility and help determine the best solution for your rifle.
It appears the installation instructions included with the parts may not have been followed. As clearly stated on our website and in the instructions, this is not a drop-in part and requires custom fitting. We have sold many of these springs, including to professional gunsmiths, and have not experienced a recurring issue with insufficient spring strength.
Due to variations in rifle manufacturing, some tuning may be required. As stated in Step 5 of the installation instructions: “Tighten the screw until you achieve the desired pressure, remaining aware of the position of the spring tab on the cam. If the proper location is not apparent when smooth, appropriate pressure is achieved, bend the tab to the best location.”
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