They are spectacular. I actually like them a lot. They deliver massive devastation to the impact area but due to breaking up so quickly, do not over-penetrate.
They're easy enough to make. Use paraffin wax. Try a standard round of 7 shot and then try a wax slug made with the same against milk jugs or 5 gallon buckets full of water.
You'll have your answer.
Glock 43 | Glock 26 G4 | Glock 19 G4 BFG | HK USP 9 | HK USP 45 (Tan) | HK P2000 | HK P30L | HK VP9 | HK 45 C | HK 45 C "Sand" | Walther PPQ 9
Daniel Defense DDM4 V4 | Arsenal SGL 21 | ASA Side-Charger SBR | Savage Mark II FV-SR
Mossberg 590A1 20" SP | Mossberg 500 Cruiser