21* the lower the angle, particularly on big nailers (frame and roof) you will see little to no hangups, and misfires.
The HF gun is rock solid. Wait until close to doing your build, buy the gun, keep the receipt. You have unconditional 30 days to return for a full refund. Likely you will be done with the framing portion of the job by then. If at 29 days it sux, return it. I'll bet right now you will keep it, and it, like Freds will get lent out to friends
These nailers are handier than a bag of doughnuts at an impromptu breakfast meet
Buy Oil, and though the HF nails work fine, a better grade from Senco, or Paslode will fire better, with less trash. Important though to get the same nail type, which would be 10 Gauge, 2-3/8" to 3-1/4" Long, 21° Angle, Full round head.
Somebody mentioned weight, and age. I'm 61, and I take offense, I can easily lift the gun, no matter the type. I do however get weary dragging 25' of hose around though, so for years I have had the solid hose to the work area, but within the close work area I always use the lightweight curly hose on anything with air from an air guage, to a full loaded roofing nailer, talk about weight
Bloomington Mike steered me toward
this curly Flexilla win win, both strength, and ultra light weight
Thanks again Mike