Well folks, I was 9 shots in. About to tell y'all I had chosen my load and I was on bull and ready to go. Then I shot number 10 and everything went squirrely and I have no idea why. I have attached a pic, but just to walk through and would appreciate feedback. Never had this issue with centerfire rifles.
Barnes T-EZ 290 grain
Test BH 209 80 & 90 VOLUME LOADS
Shots 1-3 - 90 grain volume
Shots 4-6 - 80 grain volume - chose this load
Shots 7-8 - Adjusted scope and shots were about 1/2 inch right and 1/2 inch low
Shot 9 - Adjusted scope again and in the bullseye
Here is where it goes nuts
Shot 10 - Just to double check zero - A little over 2 inches high and right.
Shot 11 - Nearly 3 inches high and an inch right.
Shot 12 - Stopped and cleaned barrel and replaced breech plug - Shot inch and a half right of center. I may have pulled it a little.
So, at this point I thought it was just a fouled barrel and maybe breech plug. Nope
Shot 13 - 2 inches high and half inch right
Shot 14 - 3 inches high and inch and a half right
Shot 15 - Cleaned barrel again - 2 inches right and 3 inches high
Shot 16 - 2 inches high and 2 1/2 inches right.
So, basically after great shots and walking it into bull, most every shot after that was high and right by 2-3 inches. I checked the scope at the range. Nothing loose. Came back to house, removed scope and checked both the ring and mounting screws. All were torqued to spec. Now doing a thorough cleaning. I am running low on bullets and powder. I might be able to do one more session of about 8-10 shots. I do have other bullets and pellets, but that is testing all over again and with the range days, I will lose a week of season and the season is only 2 weeks.
Wise people speak!
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