Heavy bullet 223 detachable mag length

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liberty

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Looking for advice from the heavy bullet 223 Rem shooters out there.

I have a Remington 700 in a Krg Bravo stock.

I load 80.5 gr Bergers at 2.560"coal. Wanting to know which detachable mags to get that will allow this cartridge length to feed from the mag.

Advice appreciated, thanks..
 
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You will want to use Accurate Mags. This is how.

I have modified mine to run 2.660" OAL, but I run 88s and 90s.

Best to use a small end mill of about 0.125" or possibly even a small burr for a Dremel tool.

MDT did come out with a similar metal mag with a plastic insert but I have not yet confirmed that this will work with that mag, but I have modded 4 accurate mags and they all work perfectly.

 
I shoot 80 ELDMs and they are like 2.565. With the plastic MDT mag, I just took a small round file and filed out a spot to fit the point of the bullet. Works for me.

Got a Accurate mag but havent touched it yet because with a Savage action, I dont think the action comes back far enough to pick up the round when you trim the back of the Accurate mag. So I never toughed that one. I believe they have a shorted bolt head you can buy for it though.
 
titch-- said:
I shoot 80 ELDMs and they are like 2.565. With the plastic MDT mag, I just took a small round file and filed out a spot to fit the point of the bullet. Works for me.

Got a Accurate mag but havent touched it yet because with a Savage action, I dont think the action comes back far enough to pick up the round when you trim the back of the Accurate mag. So I never toughed that one. I believe they have a shorted bolt head you can buy for it though.
Click to expand...

just shortern the 'arm' on the baffle until the bolt will go back far enough to suit.

simple

Jerry
 
Maple57 said:
You will want to use Accurate Mags. This is how.

I have modified mine to run 2.660" OAL, but I run 88s and 90s.

Best to use a small end mill of about 0.125" or possibly even a small burr for a Dremel tool.

MDT did come out with a similar metal mag with a plastic insert but I have not yet confirmed that this will work with that mag, but I have modded 4 accurate mags and they all work perfectly.

Click to expand...

By the way, I did receive a new metal 223 mag from MDT recently and it is not as easy to modify as the Accurate Mag.

There are slots in the side wall at both the front and back on the Accurate Mag that guide the follower. The MDT mag only has a slot at the rear. Once the mag is lengthened from the inside on the MDT mag, the follower needs to be lengthened as well to control the fore and aft movement of the follower.
 
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So... I got the new metal MDT mag and I did do the modification so it would feed rounds of 2.670"... That's the longest modification I have done yet. To run 90s I need it.

I compared how the rounds feed from the MDT to my long standing Accurate Mag favorites.

Drum roll please.....

I like the metal MDT mags better, than Accurate Mag much to my own surprise!

The accurate mags feed the bullets on a lower angle so the tip of the bullet hits the feed ramp about half way up. But.. The MDT mag launches with more uppage and the center of the bullet usually misses the feed ramp. So the rounds feed much more smoothly from the MDT than from the Accurate Mag. If the stress of feeding up the ramp affects accuracy, the MDT should be better.

I will say that the MDT mag is a little more difficult to modify, but it's not that bad. I did the mill work on my drill press with a 0.125 end mill, a straight stick and two C clamps. I removed all the material off the back wall and nothing off the front. Pretty much the same process as shown in the video above.
 
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Maple57 said:
So... I got the new MDT mag and I did do the modification so it would feed rounds of 2.670"... That's the longest modification I have done yet. To run 90s I need it.

I compared how the rounds feed from the MDT to my long standing Accurate Mag favorites.

Drum roll please.....

I like the MDT mags better, much to my own surprise!

The accurate mags feed the bullets on a lower angle so the tip of the bullet hits the feed ramp about half way up. But.. The MDT mag launches with more uppage and the center of the bullet usually misses the feed ramp. So the rounds feed much more smoothly from the MDT than from the Accurate Mag. If the stress of feeding up the ramp affects accuracy, the MDT should be better.

I will say that the MDT mag is a little more difficult to modify, but it's not that bad. I did the mill work on my drill press with a 0.125 end mill, a straight stick and two C clamps. I removed all the material off the back wall and nothing off the front. Pretty much the same process as shown in the video above.
Click to expand...

Maple,,,Are those the polymer mdt mags?
 
liberty said:
Maple,,,Are those the polymer mdt mags?
Click to expand...

No, they are the new steel ones with a pair of plastic inserts inside. Pictured below.

I have no good way to modify the polymer mags to increase the round length, because there is no good access to the inside.

The metal mags have 2 plastic inserts inside, that are easy enough to make longer once disassembled. Pretty much the same way as shown in the video above. I did need to add some JB Weld the the back of the follower to reduce the gap which was easy to do with a little JB Weld and a file.

I like how MDT made the plastic inserts snap into place. The inserts have an undercut that helps them lock into place to the impressions on the side of the metal housing.

MDT_Metal223_10RND_SQUARE_02__62946.1634331913.jpg
 
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