I have used the Lothar Walther, GaugeMates, Little Skeeters and the Savage 410ers.
All work well if you play be their rules.
I find the 410 inserts work best when installed at 20 gauge or lower.
I have taken the Little Skeeters in 10-12 and 16-20 and slit them down the side. Yes, hulls are split but I have lots of hulls.
I have NOT done the rifle insert thing as I have a drilling and a double rifle.

Mike

Last edited by skeettx; 10/27/16 10:54 PM.
USAF RET 1971-95 [Linked Image from jpgbox.com]