I recently purchased a Remington 870 28" choke tube field barrel from a neighbor. The barrel is like new and it came with three chokes Full, Mod, and cyl.
I have never owned a choke tube barrel of any kind before but the price was right so I decided I have some time on my hands and I would try it.
I placed a white middle bead on the gun along with a standard Bradley front bead. I patterned the barrel from a rest with the full choke tube inserted at 13 yards.
A friend of mine has a gauge and the full choke tube measured .041. The barrel patterned straight but 50% of the pattern was below the line and 50% above. I made an adjustable stock and added bushings of 1/32 thickness to the comb but the poi hardly rose up with each added bushing???
I had to place a total of six 1/32 washers in the stock before I noticed a poi diffrence where the pattern is now showing that it is now all above the line by only 2 inches????
With every washer that I added the poi should have gone up above the line but did not. I have no idea why not, but it finally took a total of 6 washers before it clearly moved above the line that I was shooting at.
Any one have any idea why the poi did not raise up with every bushing that was added as the poi finally raised up only 2 inches above the line after a total of six 1/32 washers were added?
I am extremely puzzeled as I have never seen anything like this before.