Bore condition and photographs

[Sentryduty]

While not directly about milsurp guns, I was reminded about Patrick's explaination about bore photographs in another thread.

Below is a typical bore photo of a Remington Nylon 66, a commercial sporting .22LR semi-auto.

I have cropped out the surrounding background for clarity.



Looks pretty good, probably typical for a 38-29 year old plinker.

But why am I bothering to take photos of it?

While cleaning the bore I had noticed I encountered a tight spot on each pass of the cleaning rod and jag.

I made some measurements and located it to be about 2-3" from the muzzle.

Here are the photos of that area:





I think I now have an explaination as to why this rifle groups poorly.

This rifle has been in my family for at least 22 years and just yesterday was this issue noticed while doing a maintenance cleaning.

So be careful when buying a rifle based on bore photos it is easy to miss, or conceal an obvious problem.

Photos were taken using and LED bore light in the chamber and a modern smartphone, simple equipment, but photo setup and focal point can make all the difference.

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