I was just out shooting my new 20 gauge Maverick. Decided to try some conventional slugs, some wax slugs, and some buckshot against a target I'd recently constructed. I may have made the target a little too good. It stopped half a dozen lead slugs, cold. Naturally, it had no problem stopping half a dozen wax slugs too. My target was 9 sections of 2x4 I'd screwed together to form a 6 inch thick block. On the front, I attached a section of pressboard to make it easier to show the hits. Because all the slugs (lead and wax) are captured inside the wood, I can't really tell what they did, after impact. I can say that the entry holes looked exactly the same for the store bought slugs and the wax ones. At the 15 yds I was firing from, I'd have to call the wax slugs pretty definitive stoppers. They also feed and ejected just fine. The buckshot didn't impress the target, as expected, but I wanted to check the pattern.
As previously stated, I'm still not going to load up wax slugs for anything other than target practice, unless zombies (or something very similar). Take care. Tom Worthington