Under-strength Moulton struggled to compete on an awful wicket.
Grantham batted first and Gareth Bennett (54) and West Indian Cleton Payne (122) helped them reach 259-5. Matt Barnett was the pick of the bowlers with 3-52.
Moulton offered very little in reply and were undone by some rapid bowling from West Indian Samuel Peters. James Cornwell provided some resistence with his 23.
*Moulton 2nd confidently wrapped up their first win of the season against a strong Market Deeping side.
Harrox managed a good total of 181-9, with Jack Cusack (46) and Frazer Stone (32) the pick.
In reply, 15-year-old opening bowlers Henry Lavery and Louis Greetham bowled superbly as Deeping were bowled out for just 68. Luke Barwick (3-17) and Oli Saville (2-21) were the pick of the Harrox bowlers