Really nice shooting. I looks like you are not flinching.
I have one thought from looking at your group. The barrel may be touching the stock near the end of the stock. As it heats it will cause vertical stringing as shown. See if you can run a dollar bill between the stock and barrel. This will yell you if it's touching.
If not that is still pretty good. Have fun with shooting, you are off to a good start. A lot better than my first effort.
I have one thought from looking at your group. The barrel may be touching the stock near the end of the stock. As it heats it will cause vertical stringing as shown. See if you can run a dollar bill between the stock and barrel. This will yell you if it's touching.
If not that is still pretty good. Have fun with shooting, you are off to a good start. A lot better than my first effort.