Shot about 75 rounds of Mag Tech 38 Special + P, 158 grain ammo through my SP101 Novak this evening and after about the 1st 25 rounds, I noticed it was getting difficult to eject the spent casings. As the evening went on, it became more difficult to get the spent casings out. I brought the revolver home and cleaned it really good and attempted to put some of the spent brass back in the cylinder. The brass would start into a hole or two and would not go in, and a couple of holes it would not go into at all. I got my GP100 out and the spent casings went into the cylinder easily and ejected easily. This was the 2nd range trip with the gun and I didn't notice it on that trip, but I also only shot about 25 rounds that time. I've never experienced this before, is there an issue with the cylinder in my revolver? I've used Mag Tech ammo in other firearms and never had an issue, what can I check on the ammunition to see if there is an issue with it? Thank you in advance for any replies.