I will drop back again some grains and function up and see what comes about .I've and use alot in the 2400.Obtained 2 on the outdated Enfields No 1 MKIII's and wish to check out it in them also,haven't loaded for them however but beeing a rifle bored out to 410ga it might be that I could bump them up somewhat extra,an ordinary 410 shotshell wont in