I did this modification and then reversed it with a pair of screws on the other side to go back to original length of about 0.100" over the original limit. When you use the long shells at the full rear position, the follower tends to pop up and tilt the rear of the shells to low to feed. I leave it in the short mode for rounds of conventional length.
What length did you use for a rear position?
Or would a slightly shorter OVAL in the mag to overcome this problem or would 0.100" be max before the described problem begin?
