Ewan, I have the same crimpers and found it crimps the smaller part of the terminal fine but when I try the bigger part it ends up all miss-shapen, what was your experience?
found it fine for 3.9 bullets Mick ... although it did take a few to get the hang of positioning the rear end of the bullet in the crimper just right to get a good fold.... bearing in mind I was doing a full loom I got plenty pratice
. I'm happy that everything is secure even if some of rear end crimps aren't totally pretty. Just to be sure I put some heathshrink on too before putting the plastic sleeve on. Photo in the above post shows a bullet with heat shrink and sleeve on.
Photo here (though not that good) shows a bullet fresh out the crimper
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and this one shows with heatshrink added, before plastic sleeve put on