Hey guys, new to the forum and i have a question that im sure someone will be able to help me with. I bought a smith and wesson model 60-3 .357 2" barrel a little while ago. The gun is in like new condition and i really like it, its very accurate and ive put probably close to three hundred rounds through it. The only question i have is that sometimes, maybe once in a box of 50 or so, i will get a little sting on the cheek. Sometimes this does not happen at all, but just every now and again. I have done the timing check and it is dead on in time to the best of my knowledge. Now this usually happens near the end of a box of ammo, sometimes in the middle but mostly at the end of a box of 50. Now, im not shooting hot .357s out of it, just plain jane .38 special. I believe it to be just unburnt ammo and stuff. The forcing cone looks to be in spec also. Would you guys be worried about it? This may be a stupid post but im kinda anal over my guns. Thanks in advance for your replies.