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6gt in ctr mags
- Thread starter 44ron85
- Start date
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Just loaded 10 gt rounds in a ctr mag and cycled through my ctr 65cm. With the rounds slid all the way to the rear, feeding is unreliable, bout 60-70%, there was some funky nose dives and awkward undulation as rounds moved up the mag(believe the odd shaped follower has something to do with this). Tuning the feed lips to give more nose high bullet presentation may help here.
Load them in the mag where there is some space at the rear, like the bullet tip is close to end of mag box and it was 100%. Problem is, under recoil the rounds will move rearward in mag, and you'll get miss feeds in actual fire.
I run into this use ai aw/ax mags in my ai atx rifle with the gt. Run like crap when loaded back, run good loaded to front, but recoil in 10 rounds will bump cases to rear making last 3-4 feed unreliably.
Solution: disassemble ctr mag, shorten follower, custom fit a delrin spacer to take up approx 0.3" in the rear of the magazine. The problem is, the rear the ctr followed is contoured and rides in a rear channel to keep it centered. I don't know if the follower will run well once doing this. Also stretching the ctr mag spring will help by applying more upward pressure on the follower.
This is all I got, hope it's insightful!
Edit: I have 5 rifles in 6 or 22 gt. 3 control feed zermatt or arc actions, an AI atx and a bat bumblebee. The 4 700 clones all run great from 10-12rd arc aics mags(however recently discontinued) the AI take proprietary AI aw or AX mags, and I described my results with them above. I am waiting for HRD BR mag kits for the AI mags to come back in stock and I'll modify them to work with the GT case versus their intended NR varient cases.
You may be better off swapping to an aics bottom metal and utilizing aics mags.
Load them in the mag where there is some space at the rear, like the bullet tip is close to end of mag box and it was 100%. Problem is, under recoil the rounds will move rearward in mag, and you'll get miss feeds in actual fire.
I run into this use ai aw/ax mags in my ai atx rifle with the gt. Run like crap when loaded back, run good loaded to front, but recoil in 10 rounds will bump cases to rear making last 3-4 feed unreliably.
Solution: disassemble ctr mag, shorten follower, custom fit a delrin spacer to take up approx 0.3" in the rear of the magazine. The problem is, the rear the ctr followed is contoured and rides in a rear channel to keep it centered. I don't know if the follower will run well once doing this. Also stretching the ctr mag spring will help by applying more upward pressure on the follower.
This is all I got, hope it's insightful!
Edit: I have 5 rifles in 6 or 22 gt. 3 control feed zermatt or arc actions, an AI atx and a bat bumblebee. The 4 700 clones all run great from 10-12rd arc aics mags(however recently discontinued) the AI take proprietary AI aw or AX mags, and I described my results with them above. I am waiting for HRD BR mag kits for the AI mags to come back in stock and I'll modify them to work with the GT case versus their intended NR varient cases.
You may be better off swapping to an aics bottom metal and utilizing aics mags.
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SSG Graybush
Well-Known Member
My 6XC rounds nose dive in Accurate Mags as well. The only fix was to use AI mags. it has to do with the rib on the side of the mag, it stops the case from moving forward so the bullet tip doesn't contact the front and nose dive. I believe 6mm rounds with long high bc bullets are the cause. Too long from datum line to the meplet.
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I know guys have luck with accurate and magpul pmags. Some issues and inconsistency with mdt. But tune the lips and it'll likely come together. I have built most my gt on control round feed actions and they run fantastic, heck even br bra and dasher all run on crf actions with good mags. Push feeds get tricky with the shorter cases. My bat was having some issues today with some short stubby 6gt bullets when it normally runs well with longer high bc 6mm pills.
My first 6gt was on an impact, I ran pmags with the feed lips shaved down in the start, then got some ARC mags and all was good. MDT worked after lip tuning. A chassis with adjustable mag latch for tuning the amount of case head presentation goes a long way too. My Bartlein carbon 6gt is having a major problem currently on my bat. First 10 rounds walk right by 2 moa as it heats up. After it'll shoot great groups when it's hot. I've repeated the test 3 times now with 20 shot groups. The new barrel will not be carbon, nor a Bartlein. It'll probably be 6cm because I want a hunting rig to run 100% all the time. 6cm runs from every mag I've tried it in. Which has been ai, arc, accurate, magpul, mdt. Top end velocity wise on the 6cm is 200+ fps over the gt as well but barrel life suffers. Hunting rifle.......who cares.
My friend runs mdt and ARC with his XC, without issue. I'd stretch the spring to get more pressure on front side of follower and see if MKM makes one their polymer followers that nose high.
SSG Graybush
Well-Known Member
Am telling you, a 6XC with a 112 gr MB will not feed from a Accurate or Magpul mag without nose diving. You can stretch springs or bend feed lips all you want. it's in the design of the mag. First round may work, but follow rounds will most likely nose dive.
SSG Graybush
Well-Known Member
I went through this about 3 years ago while setting up a prs rifle. Dude on fb was like switch to AI mags. I didn't listen, tried everything, eventually I switched. Spend the $$ and save the headache. I believe they make a insert for dasher and gt's as well. For the really short cases. I am gonna have to use a life line, and phone a friend.
SSG Graybush
Well-Known Member
6GT mag issues, dasher mag?
I am having ongoing magazine and feeding problems with my 6gt. Rifle is a Defiance Tenacity action in a KRG bravo chassis. So far I have tried AICS, MDT, Accurate mag, and Magpul mags. -Aics mags- Does not advance rounds level. After 4th to 5th round, cases start advancing nose high, bases...
www.snipershide.com
AI mags work fine. You may need to tune the feed lups. No spacers required.
Are you talking ai aw mags with hrd kits? Action has to be cut specifically for aw mags to run this route, luckily there are more and more options these days. My lone peak fuzion is aw cut, but still struggles to run 6bra from aw mags. Tikka will not run from aw mags unfortunately.
ARC mags also run well. You shouldn't need a spacer with GT like with the dasher or br variants. The longer case length was an improvement or compromise to get around the spacer and feeding issues. For some reason I couldn't get the MDT mags to work. I have heard MDT is fixing this issue. I know this doesn't answer your question really, but just sharing my experiences. I almost always have to tune mag feed lips to case/caliber.
