Just checked my new in Black boxes 16 grain Zan slugs, no mentioning of speed on them.
@Rizz01 Last year i shot two of my best 5 shot groups ever, and back to back even, at 86 M / 92 yards using 13gr Zans and maverick with heavy barrel.
Normally i turn these 2" targets to Swiss Cheese playing the game i call " Annihilate the red base " that being the red dot on the target.
You can do that with 1 perfect shot dead on, but me and my rifle are not that good so it have only happened 1 time in like 200 attempts, just like i have only hit 1 fly at 86 M in spite of trying every chance i get, and there are many flies coming to my sugar water doused backing cardboard.
So for the most it take me 20 - 30 shots to remove all of the red " base", but some times i also just pile slugs into the same hole beside the remains of the red dot and in the end i give up and move to the next target.
This is a screen grab of the video from yesterday with my 5 shot "attempt" at 93 M / 100 yards, at the time my speed was not ideal, and the wind was still plentiful, so i got lucky on that one.
1-2-3 shot in one group, then 4 shot went way high and L, and finally 5 shot to the R of the first 3 shots. All 5 shots i was aiming at the 1 O clock position on the 1" ring.
Speed mostly to blame for my holes wandering all over the place at this time, as you can see around other targets in frame, finding a better speed later on made things a lot more enjoyable.