BlueStocking hit the nail on the head
. Use a really good cutter
to cut the cable and strip the insulation
off. The Sears $19.95 cutting tool mentioned earlier in numerous threads is indispensable....I have four of them.
And, use a purpose-made crimper of high quality. Forget the hammer variety and other workarounds, unless you're really in a pickle. Then, the Nicopress tools work pretty well, though take a long time and are a pain in the butt if you have lots of crimps to do.
I use Greenlee crimpers....the big one covers AWG8 to 4/0 cable, with rotating dies. The smaller one covers AWG8 to 1/0 cable. I tend to use the big one, since it makes light work of the crimping process, and the results are always very professional. These cost $200-350 each on the street.
I'm very happy to help anyone I can, but I don't lend these out.