Thread: Scope mount screws

Hi all.

I need some help please...

Picked up a second hand 300 WM last week with Bushnell scope mounted on a 20 MOA rail.

Took it to the range Saturday and had to bore sight then got onto the 100m range and ended up with a sore shoulder before I was satisfied with grouping. When i picked the rifle up to take home I realised the scope had come loose. The screws mounting the scope to the rail were the culprit and I went o tighten them when I got home but they appear to be screwing all the way through the screw hole without tightening. They aren't stripped, I just don't think the screw head is the correct width?

ChatGPT tells me there are a couple of different standard screw sizes, is this likely to be my problem? Any recommendations on correct hardware to use?

Appreciate the help in advance.