▁The ▁shell s ▁lack ed ▁the ▁explos ive ▁power ▁needed ▁to ▁get ▁at ▁troops ▁in ▁rein for ced ▁b unk ers ▁and ▁they ▁did ▁not ▁have ▁enough ▁explos ive ▁power ▁to ▁destroy ▁tren ches . ▁ ▁By ▁comparison , ▁a ▁French ▁Mort ier ▁de ▁ 5 8 ▁mm ▁type ▁ 2 ▁we ighed ▁ ▁and ▁could ▁deliver ▁a ▁project ile ▁that ▁we ighed ▁between ▁. ▁ ▁While ▁the ▁British ▁Sto kes ▁mort ar ▁could ▁deliver ▁a ▁ ▁project ile ▁it ▁had ▁a ▁better ▁rate ▁of ▁fire ▁and ▁only ▁we ighed ▁ ▁versus ▁the ▁ ▁for ▁the ▁m le ▁ 1 9 1 5 . ▁ ▁For ▁these ▁reasons , ▁the ▁m le ▁ 1 9 1 5 ▁did ▁not ▁last ▁long ▁after ▁the ▁end ▁of ▁World ▁War ▁I . ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁http :// www . for ume er ste wer el door log . nl / wiki / index . php / Mat % C 3 % A 9 riel _ de _ 7 5 _ mm _ de _ tr anch % C 3 % A 9 e _ mode le _ 1 9 1 5 _ type _ A _ Sch ne ider ▁ ▁http :// www . art iller ie . asso . fr / bas art / article . php 3 ? id _ article = 4 5 9 ▁ ▁http :// www . ma quet land . com / ph ot ote que / im pression / 4 7 8 2 ▁ ▁http ://