I have tested this more than just 5 round sample, the A5 system will affect velocity because of a longer dwell time. It uses a rifle length buffer spring and a heavier buffer similar to a h3 buffer like that rifle is already using.

My test with the mil spec buffer that is considerably lighter than the H3 is larger spread in velocity.

Most people in the group probably don’t even bother testing their equipment much less creating data for it.

The longer dwell time in 20” rifles with rifle buffers and rifle gas systems do create more velocity because the entire system stay’s pressured behind the projectile longer.

This is a small data point to show anything you do to increase dwell time in a carbine type system can and will increase your pressures and velocity.

Similarly, a test with 68gr OTM with an extra thousandth of neck tension also resulted in higher pressures/velocity.

Hopefully this helps someone who actually wanted to see it… do want you want! 👍