The .22LR tube gun has gained a bipod and different ‘scope.
I have been practising shooting this off-hand for LSR and despite being used to heavy rifles I have struggled with this for a variety of reasons so it was time for a change. Accuracy at 50m was superb so why not put it to the test a bit further out? A stud for the bipod was added as I really cannot be doing with a machine rest and the scope was swapped out for a sidewinder. I raised the cheek piece by adding 10mm spacers, yes fully adjustable for height would be nice however it would have added far too much weight and lets face it, once a rifle is set-up correctly it is seldom adjusted.
Final job was test the new set-up and it was a disaster, the POI was way out from the previous outing and I was starting to doubt myself, was it a problem with the rifle or is transporting it in a soft case in the back of a Defender not going to work?
So the rifle was ripped apart and everything checked with the rifle in a vice and a laser pointer used for reference. Starting from the back the butt assembly was removed, followed by the bolt and still no change to the erroneous POI, so I took the opportunity to clean the bore and bolt thoroughly (No issues) Before cracking off the action screws and at this point everything changed, the error was gone and normality resumed. So the action screws are back in and torqued to 4,5 Nm/40 ft lbs and it is ready to be tested at 200m this coming week.
So why the issue? Well having shot it the time before I ran around all of the fixings with a Hex key and found the two M6(F) action screws were not as tight as I would have liked, so I nipped them up like I would on the rear axle of a truck and there lies the issue. So, a somewhat obvious lesson learned and noted. The chassis design is finished now and what better of developing/writing the manual for it than getting out and shooting it?