Hunting Washington Forum

Equipment & Gear => Guns and Ammo => Topic started by: robescc on December 18, 2009, 09:19:41 PM

Title: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: robescc on December 18, 2009, 09:19:41 PM: I am staring a build for my own custom ar15. I want something out of the ordinary. I can't decide if I want to go with the 6x45(necked up .223 brass) or a 6mm br. I have read a few articles that say the 6mm br cartridge does not feed well in auto loaders but other people say it's great. Any ideas? I will be using it for a target/varment rifle.
Title: Re: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: mkcj on December 18, 2009, 09:28:28 PM: You might find this site helpful for the 6BR load.

http://www.6mmbr.com/index.html
Title: Re: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: robescc on December 18, 2009, 10:36:43 PM: I am aware of this site. I have read about every page. I was looking for opinions from guys who have had experiance with 1, both calibers and 2, in an ar platform.
Title: Re: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: AWS on December 19, 2009, 08:21:38 AM: No experience with them in a AR but have a great little Rem 600 in 6x45mm and it won't ever get sold. The 6x45 should work great.

Too bad your restricted by mag length a 6mm/204 is a great round also.

AWS
Title: Re: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: robescc on December 19, 2009, 09:15:16 AM: I have looked at the .204 ruger. I believe from what I have read that crtridge will work in the ar15. I have seen few companies that offer that caliber.
Title: Re: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: AWS on December 19, 2009, 09:59:17 AM: When you go to 6mm the bullet length gets to be a problem as they would have to be seated so far into the case that you lose whatever you gain by using the 204 case. my 6mm/204's are running 2.40 with 55gr BK's.

AWS
Title: Re: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: robescc on December 19, 2009, 11:08:47 AM: That's a good point. Thanks AWS
Title: Re: 6mmx45 or 6mm br in ar15 platform. What to do?
Post by: CastleRocker on December 19, 2009, 09:15:18 PM: I don't know if you have looked into it or not, but if you really like the 6mm, you may want to consider the 243 WSSM. I don't have one personally, I do have a 25 WSSM, (only because that's what was for sale when I was looking for the 243), and it feeds great, shoots unbelievably well, and with the upper I have, there is very little recoil or muzzle jump. Ballistically, my 25 is between my 257 Roberts and a 25'06. It just has a much quicker follow-up shot! Magazine followers need a bit of modification, but they work well.

You might pm Rainshadow, as he has one in 243 WSSM and just shot a cougar with it. They are a little "different" when used in an AR, but you can still buy factory ammo in a pinch. Just a suggestion.

I still have my 6.5 TCU barrel for my contender from the silhouette shooting days, and it is still one of the most accurate firearms I own. I've been thinking about a new upper myself that would be a little different...hmmm