The Firing Line Forums - View Single Post - 5.56 chamber shows more velocity than wylde chamber

thesheepdog · February 3, 2013, 12:09 PM

I have been testing a mk262 clone for weeks and here are some interesting results from the two guns I used to test velocity.

Gun #1:
16" barrel, 5.56 NATO chamber, 5R rifling, melonite treated.

Gun #2:
16" barrel, .223 wylde chamber, 3R rifling, melonite treated.

The velocity on the 5.56 was about 100fps faster than the .223 wylde;consistently higher.

Average velocity of the 5.56 chamber was 2665fps with a high of 2680 and a low of 2650.

The .223 wylde experienced much lower velocities.
Average was 2550fps with a high of 2570 and a low of 2530.

Thoughts? Comments?

All of the ammo was loaded the same.

February 3, 2013, 12:09 PM	#1
thesheepdog Senior Member Join Date: May 12, 2010 Location: DFW Texas Posts: 1,996	5.56 chamber shows more velocity than wylde chamber I have been testing a mk262 clone for weeks and here are some interesting results from the two guns I used to test velocity. Gun #1: 16" barrel, 5.56 NATO chamber, 5R rifling, melonite treated. Gun #2: 16" barrel, .223 wylde chamber, 3R rifling, melonite treated. The velocity on the 5.56 was about 100fps faster than the .223 wylde;consistently higher. Average velocity of the 5.56 chamber was 2665fps with a high of 2680 and a low of 2650. The .223 wylde experienced much lower velocities. Average was 2550fps with a high of 2570 and a low of 2530. Thoughts? Comments? All of the ammo was loaded the same.