Hey all. I went shooting this past weekend with my Ruger 10/22 and was having some issues. I'm shooting a stock 10/22 with 2x Butler Creek 25/22 steel lips mags. Ammo is Remington Thunderbolt 22. Had 2 of the cases split along the side and jammed up in the chamber. The cases were easy to dislodge. Ran about 250 round through the gun, and these were the only splits. Had a 2 fail to feeds but I think that was user error. Gun was clean prior to this outing (I clean after each outing) and was cleaned afterwards. I inspected and noticed no signs of any bolt, chamber, or feed ramp issues. Any ideas what could cause the cases to split like this? Thanks!