410 grains @ 2000 fps - that would be the most powerful slug out there wouldn't it?
And who actually makes a 3 1/2 " 20 gauge?
The projectile is 350 grains, they add the weight of the sabot to get the 410 grain weight. It may be the most powerful slug in 20 gauge out there, but I think some of the 12 gauge slugs have it beat, and are much flatter shooing to boot.
It will be interesting to see if it flies with the public, it certainly doesn't fly with me. While it has about 33% more energy than a Hornady sst or Remington core lockt bonded slug at 250/260 grains respectively at 200 yards, both of the latter are flatter shooting with about the same zero as the hastings slug, and they are 2 3/4" shells. The Remingtom Core lockt bonded slug in 12 gauge , at 385 grains, has more energy, and is much flatter shooting out to 200 yards with about the same zero, and it too is a 2 3/4 inch shell.
While I like a 20 gauge slug gun, before I would buy a specialty gun with a 3 1/2 inch chamber to shoot this round, I'd simply use a 12 gauge with a 2 3/4 inch Remington slug. While the Remington Core Lockt bonded slugs are extremely pricey, I'm sure these hasting slugs will also be priced accordingly, and in my humble opinion, the remington, in both 12 & 20 is the best slug out there, from a standpoint of accuracy, bullet design, flat shooting and tenacity and effectiveness on game. Just my humble opinion.