Envoy lower lugs ground down on seemingly little used rifles?.

Having 3 No1's and a No4 all with varying degrees of sear/lug interferrence, I checked my others to find my Envoy lower lug has been roughly filed down even though the rifle seems to be in excellent condtion. I mentioned this to a dealer with several Envoys in stock and he checked them to find that those too have been ground down whereas the L39's they have are not.
Is this just coincidence or did some rifles leave the works having ground lower lugs.
Perhaps civilain rifles were expected to be more heavily used and retained thus allowances made on the Envoy for body wear, or maybe used actions were refurbished for the Envoy line, or maybe the triggers are tuned to cause the sear sit higher?.
Just curious!.

The answer to this was written up by me some time ago and is on the forum somewhere. So, to save writing it up again, maybe someone can resurrect the answer. But in short, the very last thing you need is for the sear to sit too high!

Yep............. the angle of the sear face was changed from up to 4 degrees to 'up to 7 degrees' in order to lighten up the second pull to exactly 5 lbs pull off. According to the EMER's, it was never acceptable or permissable to lower the pull-off to below 5lbs
This may be the answer. PL wrote:
" No doubt the Police experts, in their own 'expert' way allowed it to become less that specified by the real experts at the factory and practiced by the other experts at their workshops............

Together with this, the weight of the sear spring was lowered by the expedient of cutting another slot in the magazine catch to lower the sprung weight.

We had a sort of valve grinding machine set to refinish worn or grooved cocking pieces to 4 degrees or less but not more than

It gets quite complicated............................"

Close RCEME Ralf and it was one of the bits I mentioned but I wrote a small piece about worn bodies and the relief at the underside of the lower locking lug of the bolt.......

Maybe if theres any sort of demand for a fuller explanation to JSS's querie, I'll re-write it. But it is quite complicated. Once it's explained, and you look at your FTR rifle bolts, you'll see and understand. It's all to do with yet ANOTHER fault that can cause a rifle to be ZF and a 'one-off' cure/rectification. The dreaded ZF again.............