I didn't have any jam bit I have heard there have been some issues. I contacted Verdict and they sent me 410 shells that were made for the SA-410 so they wouldn't jam. As for a tighter pattern at 40, not sure. I really like the Gavel and the Verdict combination.
No where near enough pellets in that little shell for a decent pattern at40 yards,you got to many voids in there,those 410s should be outlawed they aren't big enough,if you cant handle a 20 gauge give it up a 20 gauge with TSS walks all over that crap you just did
