yeah must be regional .rarely do i see 30 .passload i think uses them .
i have never used anything but 21 degree .Years ago - like 30 or more I was told it related to the brand of gun .but really do not know for sure
I currently use a 21 degree but will be looking into a 30 degree Hitachi airless nailer this spring/summer. It was explained to me years ago that the difference is the angle of the magazine and the ability to get the nailer into tight spaces or at use it effectively at odd angles. I have been in places where the magazine (21 degree) gets in the way and doesn't allow me to place a nail right where I want it, the 30 degree and steeper angled magazine would have helped...21 degree is cheaper for the most part but go with what your local hardware store carry so your not hunting for nails. ~Anthony
21deg was typically full round head and 30 deg was clipped head. Some regions don't allow clipped heads, especially for plywood. Paslode makes round drive nails for 30deg which meet the requirement typically, and that's what I use. I have an old Bostitch n80 as well that uses the 28deg wire weld nails, but its rarely used at this point. Bostitch always seemed to do things different. FN nails, 28deg, etc
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