Thank you for the post. I learned a lot today.
Weights are important, but so is the clearance in the buffer tube and the holes in the back.
That buffer pushes a lot of air, some only have a single small hole in the back of them, while other higher quality tubes have them along the bottom as well. A tight tolerance buffer tube will resist enough to make a difference, we used factory ammo once and marked where the shell casings landed on a couple of dozen rounds with a factory tube. Then, using the same buffer and weight we put a higher quality tube with different weep hole configuration in it.
The difference of the angle and how far the brass ejected was quite drastic. I program for a guy who makes them for 5.56 and 7.62, with the proper length as well, not like some people who interchange the 7.62 because it works.
Good post, but you have to consider the weight of the complete moving system. That is, the bolt carrier group too. An M16 style carrier weighs more than a semi-auto carrier. Sometimes, especially with a caliber other than .223 or 5.56, you need to use the lighter carrier.
Bkmk
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