The M70 triggers come sealed with an epoxy sealer for their weight of pull adjustment screw. Once this adhesive is removed it is an easy matter to adjust the weight of pull and the overtravel, it is an easy job but the weight of pull should not be brought down to below 3.5lb, a proper trigger weight pull scale is a must for this job and in no way should anyone try this adjustment without one. The sear engagement is the only adjustment that cannot be done and the adjustment for that is for the experienced gunsmith, not reccomended for anyone else. If after the two first adjustments don't satisfy you then either bring the gun to a gunsmith or replace the trigger, Timney and Jewel both make good triggers for the M70, they are not as uncomplicated as the factory trigger but the M70 trigger is known to be a bulletproof and very simple design, but they are another solution if there is no gunsmith available and usually easy to order and install.
bigbull