Anyone seen / used these?
http://www.wideners.com/itemdetail.cfm?item_id=100001100&dir=
Now you know as much as I do about them. Ran across it and thought I’d share. Have not really seen the need for a mod to the ribs.
Wilson Combat has been selling the D&H 300BLK mags for a year or so. I thought about picking one up, but never really saw a need for them since mine has never had a single problem through pmags.
They have been out for a while. I havent messed with one.
The ribs are supposed to be reduced so you can load most rounds to mag length and still get good feeding.
P-Mags seem to be the worst when you try to load long the round wont feed right since the rib pushes them to far to the left or right and they hit in between the feed ramps. Regular GI mags are better, Lancer AWM’s seem to be the best(i.e. the smallest rib).
I might get some of these to try, but I have been having good luck with the Lancer AWM’s. I cant remember my COAL with the 208g AMAX, but its pretty long. In Pmags I was loading them to 2.120, but I believe I am somewhere in the 2.220 or maybe longer with the AWM’s.
Magpul has made reference to ‘broached’ Pmags for 300, but I couldn’t get any more info. I haven’t had problems with standard mags of any kind, but my ammo selection has been limited as well.
I’ve only used 20 rnd Stoners mags for my 300 Blk. I don’t think I’ve used my GI or Pmag 30’s? I guess I need to give them a go with 300 Blk. But I’ve had zero problems with the Stoners. Only feed problems I ever had was with FP cast bullets, Just have to ensure correct seat length and even they feed just fine.
Yes,
They have the 300 mag and they have de-ribbed Lancers for the 7.62x40WT.
These to seem to open up more opportunities for 223 based variants.
$28 for a mag? No thanks.
I’ve never had issues with Pmags when I had a 300BLK AR. Most GI mags and other mags will work as well. I don’t see the point of a 300blk specific mag…
Not me either. I had 2 of three Lancers give me feed problems during the first use, then afterwards no problems since. My Pmags, and Stoners (for hunting) all work fine.
The only mag issue I’ve ever really had with this caliber is something I’ve never heard anyone else complain about. As the bolt cycles to the rear it “draws” the top round up out of the feedlip, pivoting on the case had. This leaves the round still in the mag but pointed so high that the bullet tip hits the rear of the barrel extension at the top. I can recreate it in slow, hand cycling, it’s weird. I never saw this for years and then it started happening, with a variety of mags, nothing having been changed. It seems like part of the prob is that the shorter case body is not “held” by the feedlip as effectively and so the ctg is more easily pulled out sideways, again pivoting on the case head. I would call it an inherent flaw of the ctg/mag combo except that I’ve never heard of or seen it before.
This started happening just as my interest in the caliber was entering a waning stage so I did not really put much effort into getting to the bottom of it.
We actually designed the 300 BLK bullets to be optimal for normal mags.
That being said, these mags should be better for people who want to load typical pre-existing 308 bullets (or lead cast bullets) to as long an OAL as possible - like for special hunting or 3-gun use. They would also be good for 7.62x40mm.
As for Barnes black-tip, Remington AccuTip. Remington UMC, Remington subsonic, or other brands of ammo also optimized for normal magazines - the bullet already rests on the USGI rib in the correct way, and reducing the rib may make the cartridges cock outwards.
I have seen that happen with very short bullets like the Remington 123 grain (AK bullet) and 110 V-MAX. We solved it by discontinuing the UMC that used the 123 grain AK bullet. I have learned that you ideally want bullets that result in cartridge OAL of 2.120 inches or more. Coincidently or not, the 223 SAAMI drawing specifies 2.125 as the minimum cartridge OAL. Maybe they knew something? All Remington 300 BLK ammo is that long or longer. You can go shorter for non-critical uses such as hunting as the shorter bullets still work almost always.
http://www.saami.org/pubresources/cc_drawings/Rifle/223%20Remington.pdf
It is not bullet-weight specific. It’s like if you have a paper towel tube on the table, let’s say pointed away from you, with a book between you and it so it can’t slide toward you. You wet your fingertip and draw it along the top of the tube toward you. The tube stands up (no, I haven’t tried that but it was the best thing I could imagine to explain this little phenom).