[taylorce1]

Part 4, a lot of pictures in this thing!

Another accuracy robbing issue I often encounter is the length of the front base screw. I only use Talley LW low's on a Montana. The front most screw is longer than needed. The bottom of the screw bottoms out on the barrel threads. This prohibits the base from being fully seated and allows the front of the base to move. Not to mention the fact that you could be messing with barrel harmonics...

The picture below shows shiny spots on the threads. They don't look like this from the factory. The shiny, flattened spots are a direct result of the screw making contact. I don't have a "before" picture in Photobucket, you'll have to trust me on this...



The pic below shows all four base screws AFTER the front screw has been shortened. All four screws are the same length when shipped from Talley. I shortened the screw on the far left with a Dremel. I'm posting this pic as a reference as to how much I take off the screw.



The front action screw is also an enemy. It's too long as well and bottoms out in several Montana's I've owned as of late.

The pics below aren't great and it's hard to see what I'm referencing. In person, the results are glaring. The screw makes contact and polishes things up a bit. As usual, if your front action screw isn't fully seated groups will open up considerably.

Some guys use lipstick or a magic marker to check this. I've done so in the past. The action below was as new, then after about 20 shots. Things are polishing up and showing me the screw needs some attention.

As new...



After...

The End!