Sometimes people misunderstand the concept of angles. They think that a 21-degree framing nailer means that the nailer will shoot nails at a 21-degree angle and a 28-degree angle means the nailer will shoot the nails at a 28-degree angle.
But the fact is the angle does not affect the angle at which the nail emerges from the head of the nailer. In a 21-degree framing nailer, the nails are organized at a 21-degree angle, and in a 28-degree framing nailer, the nails are organized at a 28-degree angle inside the magazine.
21-Degree Framing Nailer
The ideal fact is that the nails inside a 21-degree framing nail gun will remain at a 21-degree angle but in reality, it is almost impossible to maintain the angle strictly. The angle can vary from 20-22 degrees. You will be happy to know that this 3-degree variation is useful for your work. It gives you flexibility during shooting nails.
The 21-degree framing nail gun is designed for full round head nails. You know most of the locations allow full round head nails in the building which is an advantage of using a 21-degree framing nail gun.
To hold the nails together plastic strips are used. The plastic strips break and fly out in tiny pieces during firing the nail. So, wearing the safety gear during shooting nails with a 21-degree nail gun is a must. The plastic strips make a lot of debris that you need to clean after work.
One can load about 60-70 nails in one clip of this nail. It is a disadvantage as you have to reload the magazine frequently which hampers the speed of your work.
28-Degree Framing Nailer
I already have said that the higher the degree the steeper the nail gun. So, a 28-degree framing nail gun will provide you more flexibility in work.
You can load a total of 3 kinds of nails in a 28-degree framing nail gun including full-round head, offset, and clipped head nails. You can load more nails in its magazine than a 21-degree framing nail gun. It reduces the time of reloading the magazine. Since you can load more nails in its magazine its weight increases as a consequence.
The nails of a 28-degree framing nail gun are held together with a wire-strip. The wire strips do not create a lot of debris like the plastic strips. So, you do not have to spend much time for clean up like the 21-degree framing nail gun.
The nails are held together in the magazine with a wire-strip that does not create a lot of debris like the plastic strip. It is safer too as it does not fly like the plastic strip during work.
People ask a common question when they compare between a 21-degree framing nail gun and a 28-degree framing nail gun and that is which one is best?
It is a tough question to be answered. If I say that a 21-degree framing nail gun is best then it will be wrong and at the same time, if I say that a 28-degree framing nail gun is best then it will also be wrong.
The answer to the question depends on the circumstances. You have to decide it by yourself depending on your work, working site, physical capability, and personal preference.