6BR feeding from an AI mag
- Thread starter Si-Snipe
- Start date
I have 2 Pierce short actions in 6br and both feed 105 bergers out of a AI mag flawless!!!!!! Now i have altered the mags slightly and these action have coned bolts. If you are interested i can let you know what i did to the mags. 1 rifle i have shot 2500+ rnds the other not near that. Let me know if i can help.
Great stuff guys thanks for the replies. Bert I would like to hear about the mods to the mag to enable feeding.
Gundog64 the smith in the UK I used was Stuart Anselm. The gun was purchased through Brian Fox (Fox Firearms). It is a Barnard SM with AI bottom metal in the stock, jewel trigger. Originally it was an AI stock and it took some milling to make it fit but I've now got it sat in an A5 which I fully bedded and it already had the AI bottom metal so accepted the mag no probs.
Gundog64 the smith in the UK I used was Stuart Anselm. The gun was purchased through Brian Fox (Fox Firearms). It is a Barnard SM with AI bottom metal in the stock, jewel trigger. Originally it was an AI stock and it took some milling to make it fit but I've now got it sat in an A5 which I fully bedded and it already had the AI bottom metal so accepted the mag no probs.
.
I really think there is a market for magazines systems that will feed the 6BR and similar calibers...
I tried to make a 30BR feed from an internal magazine, but I failed. Did the Bryant mod in a regular Rem magazine box, spring and follower with no sucess. Tried in a Wyatt box with the same results.
I just needed a 3 round capacity on my rifle, but it did not feed reliably...
I would like to know what kind of mod to do on an AICS short magazine to feed the 6BR.
LRCampos.
I really think there is a market for magazines systems that will feed the 6BR and similar calibers...
I tried to make a 30BR feed from an internal magazine, but I failed. Did the Bryant mod in a regular Rem magazine box, spring and follower with no sucess. Tried in a Wyatt box with the same results.
I just needed a 3 round capacity on my rifle, but it did not feed reliably...
I would like to know what kind of mod to do on an AICS short magazine to feed the 6BR.
LRCampos.
Seems like i tried that and the mag spring, when compressed, would hit the spacer. I only tried this with a c products mag, i hated to cut up a 85 dollar mag as beta test. This was 4-5 yrs ago and was using 66 gr barts in a m700. I wonder how a 223 ai mag would work, length of that cartridge is more similar to the br. Seems i had to really run the bolt fast to make the br/308 mag work. Unfortunately every once and awhile a rd would jump up and get caught by the barrel breech area and set bullet back alot. I am sure 2 thou nk tension did not help. i ended converting to a s-s bottom plate and sold the stock and dbm on the hide.
on the bryant modification I made it work by drilling a hole in the spring and drilling and tapping the follower in the appropriate place to keep the follower from moveing on the spring solved the problem. if you don't have a drill hard enough to cut the spring use a small grinding stone.LRCampos said:
Darrell
Just a note,check with wyatt outdoors as they make a mag and follower for remington short actions to feed the 6 br properly and maybe they could customoze your mag or even tell you how to do it.
you have less to worry about the feeding than the ejection!
I've just built a 6br on a Rem700 and feeding is actually pretty good, My problem is the ejection of the case.
The 6br case is so short, that with the standard ejector in the 2 oclock position the neck of the case rests against the lug recess once it comes out of the chamber, and is at such an accute angle it actually looses contact with the ejector plunger and falls off the bolt head onto the loading bay. see vid
http://www.youtube.com/watch?v=7g-jgOtPLjM
The fix is to install a sako extractor which move the angle to 3 oclock so the neck of the case on no in hte lug recess area....but nobody bother to explain that this introduces another issue!
As the sako extractor move the fulcrum point from 2 oclock to 3 oclock, the case now ejects at a more vertical angle and hits the scope turret then falls back into the loading bay.
I now have to fit a small shield to deflect it!@#$%
The 6br case just isnt ideal for a repeater!
I've just built a 6br on a Rem700 and feeding is actually pretty good, My problem is the ejection of the case.
The 6br case is so short, that with the standard ejector in the 2 oclock position the neck of the case rests against the lug recess once it comes out of the chamber, and is at such an accute angle it actually looses contact with the ejector plunger and falls off the bolt head onto the loading bay. see vid
http://www.youtube.com/watch?v=7g-jgOtPLjM
The fix is to install a sako extractor which move the angle to 3 oclock so the neck of the case on no in hte lug recess area....but nobody bother to explain that this introduces another issue!
As the sako extractor move the fulcrum point from 2 oclock to 3 oclock, the case now ejects at a more vertical angle and hits the scope turret then falls back into the loading bay.
I now have to fit a small shield to deflect it!@#$%
The 6br case just isnt ideal for a repeater!
I shoot the 22 BR and have messed around trying to get them to feed from the AI magazines alot. In the AI 308 magazines, I have had best luck by making a spacer for the rear, and cutting a shorter follower out on the mill from hard polymer. The only issue is the spring is too long in the original magazine so it has to be changed as well. I have tried the spring out of a 5.45x39 and it worked well as long as I didnt load more than 8 rounds.
These custom followers required anti tilt legs. Lots of cut and try here boys...
The 223 AI magazines need only to have the lips carefully opened up and they work quite a bit better and will hold up to 7 rounds.
Here is a video:
http://www.youtube.com/watch?v=7DoUfxirX68
These custom followers required anti tilt legs. Lots of cut and try here boys...
The 223 AI magazines need only to have the lips carefully opened up and they work quite a bit better and will hold up to 7 rounds.
Here is a video:
http://www.youtube.com/watch?v=7DoUfxirX68
Great video. That rifle feeds like a greased pig. ;D
Regards,
Paul
www.boltfluting.com
Regards,
Paul
www.boltfluting.com
Thank you Sir. I hope it helps. I forgot to mention that the magazines work best when set up to seat in the highest position the bottom metal allows. Otherwise the bolt will ride over the top of the rims.
I dont think the 6mm BR and its ilk are not suited to work from a magazine. Instead I believe the magazine needs to be set up for the 6mm BR. Or it needs its own super short action!
I dont think the 6mm BR and its ilk are not suited to work from a magazine. Instead I believe the magazine needs to be set up for the 6mm BR. Or it needs its own super short action!
Well i modded a 223 AI mag and it works great, the rifle is a savage with HS stock and cdi dbm. My one complaint is the feedlips are partially skeletonized and after opening up not for sure about longevity of that and the small plastic mag release catch. I got confidence up so i looked at modifying a 308 mag with the intention of being able to convert back to stock. The savages actually place the mag farther back then a Remington. I used a slightly modified ar magpul follower and an ak 30 rd spring cut in two. Bent the end to lock on to the ar follower. An ar spring is too fat to fit in the ai mag. I made a spacer that is .4" thick and put in the rear, it is held in place by the trapezoidal shape, floorplate, and one screw i added. The feedlips are perfect, they release the case head as the rd starts to go up the feedramp. The ribs to hold the 308 inplace are also perfect. The cartridge position in the 308 mag set up like this is the same as the 223 mag. Bonus is it takes me 1 minute to convert back to 6.5 cm.
I did my first AI 308 mags like you did, with a spacer in the rear, a AK mag spring, and a modified AR anti tilt follower. I carefully cut little notches in the AR follower to better attach the AK spring to the bottom of the follower. I got good reliability as long as I didnt put too many rounds in the magazine. I believe 7 is about all I could get it to run right with.
Anyway, it is a doable project, just takes a bit of cut and try. I may revisit the 308 magazine again, but in my opinion, the AK springs are still too long from front to back and the perfect follower would be a bit shorter than the AR length follower. So, I gotta find or make a bit shorter spring. Clearly length of the loaded round matters as to the leverage component of the feed cycle. The longer bullets in the 6mm BR may fare better here than my 22 BR has.
Anyway, it is a doable project, just takes a bit of cut and try. I may revisit the 308 magazine again, but in my opinion, the AK springs are still too long from front to back and the perfect follower would be a bit shorter than the AR length follower. So, I gotta find or make a bit shorter spring. Clearly length of the loaded round matters as to the leverage component of the feed cycle. The longer bullets in the 6mm BR may fare better here than my 22 BR has.
I forgot to mention, I also tried to modify the HS precision magazine in 308 as well with some limited success. It seems like a pretty straight forward conversion if you could come up with a shorter spring. I didnt mess with it as much as the HS mags were so much more expensive and hard to come by.
On my magpul enhanced follower it has a tab with a hole for a ar spring. I cut the ak spring and bent the top wire end to hook into that tab. The ak spring has about two coils longer then the mag tube. I can get almost 10 rds in before the rear anti tilt leg bottoms out on the floor plate. If i take about a 1/8" off the bottom of the legs it would be 10 rd for sure. I get back the 24th and will put pics up. Sounds like u got spring stack working against u. What follower did u use? I am using105 hybrids at a oal of 1.785" from the ogive.
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.