I have 2 Savage 99's. One is a 1963 99F with tang mounted safety, the other is a 1970 99E with a lever safety. My concern is this, on the 99E when closing the lever and holding trigger back the trigger will not engage, but, on the 99F while doing the same thing the trigger will engage and if I am too forceful the firearm will fire. Is this a defect on the 99F or were some manufactured this way? My last experience with the 99 was over 40 years ago and that one safely disengaged. I do not know what model I had then.