I have run into some problems with them.And i have been loading since the 1950,s. First off i found that i couldn,t resize my 340WBY. Nickel makes the brass harder.Even with my rock chuck press they would only size about 1/3 there lenght then to much pressure on them so i stopped,Afraid of them stilcking in the die. Then with some 270 win i got they sized hard but didn,t seem bad,but when i took them out of the shell holder the llips of the rim were bent a litte. Loading others i haven,t had any problems,even thought i really like them i kinda staying away from reloading them and just using them for when i go serious hunting,and just won,t use them again. vangunsmith