TexasCHLforum.com

Ok,
anyone have any experience with CMMG LE series? They use WASP to line their barrels instead of Chrome. How does this hold up? Has anyone who owns one had any problems? Also, I wanted to go with a 1/7 twist rate. The LE series only come in 1/9 twist. Would that make much of a difference in accuracy that would be noticeable. I plan on shooting Coyotes every once in a while. The main purpose of the gun though is just to have around for self defense. I am trying to figure out if i should keep saving up for the more expensive model which is chrome lined and has a 1/7 twist. thanks.

Barrel twist rate is dependent on the length of the bullet you will be shooting. The longer (usually heavier) bullets need a faster twist rate than lighter shorter bullets. A 1:7 twist is for long bullets and doesn't work as well with shorter bullets. The 1:9 is a general purpose twist that adequately stabilizes most bullets. I haven't a clue what WASP is I tried google and only got insects!

MoJo wrote:Barrel twist rate is dependent on the length of the bullet you will be shooting. The longer (usually heavier) bullets need a faster twist rate than lighter shorter bullets. A 1:7 twist is for long bullets and doesn't work as well with shorter bullets. The 1:9 is a general purpose twist that adequately stabilizes most bullets. I haven't a clue what WASP is I tried google and only got insects!

Apparently WASP stands for Weapon Armored Surface Protection. It is a modern alternative to chrome lining. Supposedly it is tougher than chrome lining and it is cheaper as well. That is why i want to know if it really is better before i invest in a weapon that is WASP coated. They coat not only the inside of the barrel but also the outside. So i have no idea how it will hold or if it is really stronger than chrome.

I am a little skeptical. CMMG higher end rifles use chrome. Why not use WASP on a higher end rifle if it is stronger? I want to get the rifle and i am willing to compromise on barrel twist but I don't know if i will compromise on chrome lining.

The twist rate question was covered a few months ago and although the twist is only one component in the equation, it is an important one. Understanding and employing that knowledge will get you a rifle with enough accuracy to hit those Wile E. Coyotes!!

If you want to see the effects of a too fast twist rate on a bullet, just drop a .22 conversion in on your 1:9 twist barrel AR and try to hit anything past 30 yards. Prepare to be embarassed.

This will get you started on your own research.

viewtopic.php?f=23&t=33733

Chrome lining is used primarily in military rifles because the chrome can take more abuse but the accuracy suffers compared to non-chromed barrels. My M1 carbine from the 1940's is chrome lined and the bore is as shiny as it was the day it was made. It shoots as good as I do and as a kid, I took many deer with that little rifle. I have no complaints.

I know squat about WASP coating but I found this. Let us know how it works for you.

http://dl.dropbox.com/u/1702248/WASPTechSheet.pdf

[quote="TDDude"]The twist rate question was covered a few months ago and although the twist is only one component in the equation, it is an important one. Understanding and employing that knowledge will get you a rifle with enough accuracy to hit those Wile E. Coyotes!!

If you want to see the effects of a too fast twist rate on a bullet, just drop a .22 conversion in on your 1:9 twist barrel AR and try to hit anything past 30 yards. Prepare to be embarassed.

This will get you started on your own research.

viewtopic.php?f=23&t=33733

Chrome lining is used primarily in military rifles because the chrome can take more abuse but the accuracy suffers compared to non-chromed barrels. My M1 carbine from the 1940's is chrome lined and the bore is as shiny as it was the day it was made. It shoots as good as I do and as a kid, I took many deer with that little rifle. I have no complaints.

I know squat about WASP coating but I found this. Let us know how it works for you.

http://dl.dropbox.com/u/1702248/WASPTechSheet.pdf




Thanks TDdude,

I used the real name for WASP (nitrocarburization ) that was on the tech sheet from CMMG and put that into a search engine. Much better results about what WASP really is and how well it holds up. I guess it is fairly common process that is not a coating or finish but actually changes the property and strength of the steel. I had no idea but apparently it is the same process that Glock, Springfield, and Sig use on many of their guns. Sig uses them on the 5.56. This process is being more commonly used in many new guns. I guess i will give it a try. If it is good enough for my Glocks for strength it can't be all that bad.

In addition, Lycomming uses this process to strengthen their aircraft engines. SO nitrocarburization must have some kind of good track record of standing endurance test if it is used for aircraft engines.

Bore linings are used by the industry to smooth out rough cut barrel bores. More cost effective than slower barrel production methods (hammer forging), much less polishing the bore buy hand. In some cases, chrome lining actually decreases the accuracy of a barrel.

There's a predominant misconception that because XYZ big name uses it on their products, it has to be good. The only reason any big name manufacturer uses any process is because it saves money in production. After being in the industry for more than a decade, I can say that I will never buy a "big name" firearm again. I've seen (and fixed) too many screw-ups that should have never left the factory.