I must admit i have never bore cut with saftey chain that is a really good idea to start and i repped you for it fireaxman i am going to pick up a coil myself to have onhand for any borecutting instruction i do, but i will tell you that i did my first one at the tender age of 14 with an electric chainsaw under the watchful eye of my father (dont worry i was wearing chaps helmet hear pro and steel toes) it is not a really difficult thing to do but you really need to have a feel for it, I learned in oak and ash and i will say that it is way easier to do in softwood, i cant tell you how many ooohs and aaahhhs i got from my forestry proffessors and woodsmens team buddies the first time i stuffed a chainsaw nose end first up to the teeth with no wiggle room. the girls were all convinced i was gonna die lol i think bore cutting is something that really seperates the men from the boys when it comes to chainsaw work, and im sure alot of people on here will agree with that, personally i get nervous working with people even doing ground work if they cant cut bores to me it helps give me an idea of what kind of experience they have. you deffinitly should lear how to do it at some point it is an invaluble skill for certain applications(chainsaw carving comes to mind immediately). just be careful as you learn remember your PPE and go slow, maybe pick up some saftey chain at your local hardware store and you should be fine
Tom