Biggest Hollow Point? Underwood Maximum Expansion .45 Colt VS .40 S&W

In a journey to try to find a decent load for the S&W Governor, I am testing the Underwood Maximum Expansion 220 gr solid copper hollow point in .45 Colt. To compare that to something else I am testing the Maximum Expansion 140 gr solid copper hollow point in .40 S&W through my 5“ S&W M&P pistol. I do a 4 layer denim and 10% Clear Ballistics test with and without 1/4“ MDF and a chronograph and practical accuracy test. Always appreciative of any channel help :)