I have a Marlin Levermatic (Model 62 w/ 20" barrel in cal 30 Carbine). It seems to be very critical on both feeding and extraction. I think I may have fixed the feeding problem by getting a faactory crimp die but I still occasionally have problems with extraction. Is this a common problem with this rifle and is there a fix. Also, when firing, fired cases come out with an area of black burned powder marks along the side of the case. These marks start at the mouth of the case and extend back for about 1/2 inch. I was told by someone that this was normal for the 30 Carbine. Does anyone have any info?