Magazine for PRS

bodhisafa

Sergeant
Belligerents
Minuteman
Jul 24, 2013
388
59
39046
Will be taking delivery of a Kelblys black bear action and need a 308 based magazine. What size is most commonly used in these competitions ...5 round or 10 round mags?
 

hacabrera071

Sergeant of the Hide
Hessian
Belligerents
Minuteman
Apr 20, 2019
293
39
McAllen, TX
I've seen mostly 10 rounds, but, as already said, some guys even put extenders for an extra 2 to 4 rounds.. I'm running ARC mags with an Are 419 mag extender, no issues so far! Cheers pal!
 

bodhisafa

Sergeant
Belligerents
Minuteman
Jul 24, 2013
388
59
39046
Any preference for MDT, AICS, accurate magazines?

Again this will be for PRS comps and looking for a magazine to feed 308 based cartridge with least issues
 

skidhc

Sergeant of the Hide
Belligerents
Minuteman
Sep 28, 2018
139
30
Newnan, GA
Not sure exactly what you mean when you say "308 based cartridge" - if you mean something like .243 Win or .260 Rem, I would recommend the 12 round MDTs. They are well made/finished and you don't have to buy an extender to get 12 (or more rounds). In my area (SE) anyway, there always seems to be at least one 12 round stage at matches so having at least one that can hold that many is important. If, however, you just meant a cartridge that has the same head diameter as a .308, I would find someone that has MDTs and try with your cartridge before buying. I bought a couple of them to use for 6.5x47 and they don't work for that cartridge because of the case dimensions and the location of the front internal cartridge guide rail (case shoulder is behind this rail so front ends of cartridges point left and right and cause binding). Having said that about my experience with 6.5x47 with the MDTs, I think others are having good luck using them with really small cartridges (6 dasher, BRC, etc.) when they are used with spacers - the x47 is just not quite short enough for that.
 
  • Like
Reactions: D-SIL

generalzip

Sergeant
Belligerents
Minuteman
Jun 30, 2010
2,090
557
30
Houston, tx
I've used them all. AI, Accurate, ARC, etc. Settled with MDT. Shortest package and they work better than other brands, especially when dirty.
 

XLR308

Old Salt
Belligerents
Minuteman
Mar 22, 2018
3,595
3,557
Grand Junction, Colorado
Another consideration of magazine choice is what your COAL will be based on the cartridge used and bullet choice.
The AI AICS 10 rnd mags I have with the binders I use with 6.5x47 since none of the bullets I've loaded so far either jammed or .010" off are crowding the binder.
I use alpha and accurate mags with the 65CM and 147eldm since my COAL at .018 - .020" off the lands exceeds the max in the AI mags with the binders.
 

65shootmoor

Sergeant of the Hide
Belligerents
Minuteman
Jun 29, 2019
164
36
FYI, the 419 extenders won't work on MDT 10 round mags without their 12rd spring. Both are excellent, MDT has a new extender, too.
 

MangoFett

Sergeant of the Hide
Hessian
Belligerents
Minuteman
Aug 23, 2018
147
58
Missouri
Kelby black bear owner here, AICS 10rd mags with area 419 extension in them. Run very smooth for me and I've had zero issues with them when I run them in my Remington 700, tikka, bighorn, or black bear. Cartridges are 308, .260, and 6 dasher. To be fair I've not ran the MDT mags, but I have tried accurate mags and I had issues with them.
 

DisplacedTexan

Ornery Tech Sergeant
Belligerents
Minuteman
Oct 13, 2014
971
322
Sedalia, MO
Kelby black bear owner here, AICS 10rd mags with area 419 extension in them. Run very smooth for me and I've had zero issues with them when I run them in my Remington 700, tikka, bighorn, or black bear. Cartridges are 308, .260, and 6 dasher. To be fair I've not ran the MDT mags, but I have tried accurate mags and I had issues with them.
That's odd, I have never had a problem with Accurate Mags. Had lots of problems with ARC mags though.
 

ToddKS

Sergeant of the Hide
Belligerents
Minuteman
Sep 15, 2010
305
21
46
Wichita, KS
I have AI mags and an MDT 12 rounder that I have been trying. I run the MDT mag most of the time and have not had any issues. I will likely buy another. I did do some tuning on the MDT mag but I had to tune the AI mags as well to get them to run well in my rifle.
 

kthomas

Sergeant
Belligerents
Minuteman
Jun 17, 2009
3,028
3,500
33
Tucson, AZ
Give it time. They just need a little dirt to showcase their true colors.
I really wanted the ARC mags to work, love the concept, and I'm a fan of that company.

Those mags didn't even make it out to the range. Too many issues just in the living room, couldn't trust them.

First time I saw someone drop kick a magazine out of rage was at a PRS match last year - it was an ARC mag with an LRI follower. Apparently his passed the "living room" test but not the "IRL dust test" hahaha. Makes me chuckle thinking about it.

As much as I love ARC, their mags were definitely a "swing and a miss".
 
  • Like
Reactions: PAYDIRT

kthomas

Sergeant
Belligerents
Minuteman
Jun 17, 2009
3,028
3,500
33
Tucson, AZ
I don't run a Kelbly, but through all the different actions I have, AICS mags work well and there's a reason they are the standard all other mags are held to. Get a +2 extender of your choice - I usually only fill to 10 rounds, but makes that first round come out nice and smooth when stripping if from the mag.

If you want to run the 6BR variants, the primal rights mag kits work great. I created a little "shelf" for the 6BR mag kit spacer to sit on in the extender, using Sugru.
 

Wheres-Waldo

Gunny Sergeant
Belligerents
Minuteman
Nov 2, 2008
1,539
335
Tallahassee, Fl
Had anyone had any issues with MDT 12 rounders with excessive spring pressure once you get 12 rounds in them?

I haven not shot them in the 6Creedmoor they will be getting used for (parts shipped today from ALTUS ?) but loaded to the brim with .308 they seem to have a LOT of spring tension for the first 1-2 rounds out of a work rifle.

Wondering if adding a baseplate will fix this? I really don’t want to trim off a leaf from the spring.
 

kthomas

Sergeant
Belligerents
Minuteman
Jun 17, 2009
3,028
3,500
33
Tucson, AZ
Had anyone had any issues with MDT 12 rounders with excessive spring pressure once you get 12 rounds in them?

I haven not shot them in the 6Creedmoor they will be getting used for (parts shipped today from ALTUS ?) but loaded to the brim with .308 they seem to have a LOT of spring tension for the first 1-2 rounds out of a work rifle.

Wondering if adding a baseplate will fix this? I really don’t want to trim off a leaf from the spring.
The MDT mags seem to have a really stiff spring. Seems really stiff even with 10 rounds in them.

I bought a MDT 6BR 12 round mag for my wife's 6BRA rifle. Right now I have 10 rounds loaded in the mag, will let it sit for a few weeks to break that spring in.
 

Justin30hate

Private
Minuteman
Jun 7, 2018
50
19
27
Arizona
I have both the ARC mag with Area 419 extender and an AICS 10 round with the MPA extender. Both run flawlessly in my 308 and 6BR, even without any spacers.
 

MakeSawdust

Private
Belligerents
Minuteman
Feb 25, 2017
287
210
I just got an mdt 12 round in the mail a few days ago. I left 12 rounds loaded over night and it made the first round a lot smoother to load. At first it was stiff as hell. I also used some 800 grit sandpaper on the feedlips which improved the feel as well.
 

Nicholi2789

Precision nerd
Belligerents
Minuteman
Mar 27, 2017
127
33
Oregon
I have a few of the MDT 12 rd mags. They feed everything perfectly for me. 6 creed, 6.5 creed, 308, etc.
I never had any luck with the ARC mags.
 

longgunJR

Sergeant of the Hide
Belligerents
Minuteman
Apr 8, 2019
255
130
Central Texas
I run 10 round AICS mags and like them a lot, been considering trying the ARC mags tho, I shot a match a while back with a culver stage and I wished my mag was shorter to get a bit lower and get more support from my rear bag.
 

FN-Whitney

Sergeant of the Hide
Belligerents
Minuteman
Jun 14, 2018
186
88
I know a lot of people don't like them but the Magpul mags have done well for me.
 
  • Like
Reactions: 2aBaCa

chevy_man

Major Hide Member
Belligerents
Minuteman
Jan 25, 2019
1,206
900
So far, being the poor that I am, my magpul stuff have never caused issues.

Same here.

I think so long as you have the extra slack to accommodate the plastic feed lips they work great. Probably because they're forgiving being plastic.
 

PAYDIRT

Adair County Long Guns
Belligerents
Minuteman
Oct 22, 2017
1,185
760
N.E. Okla.
I really wanted the ARC mags to work, love the concept, and I'm a fan of that company.

Those mags didn't even make it out to the range. Too many issues just in the living room, couldn't trust them.

First time I saw someone drop kick a magazine out of rage was at a PRS match last year - it was an ARC mag with an LRI follower. Apparently his passed the "living room" test but not the "IRL dust test" hahaha. Makes me chuckle thinking about it.

As much as I love ARC, their mags were definitely a "swing and a miss".
Same here.
 

flyer1a

Area 419
Belligerents
Minuteman
Feb 21, 2017
113
231
The Edge of the Plate
www.Area419.com
If someone would just make a AW OR AICS 15 round mag they would sell... hint hint Area 419....
The higher the capacity, the greater long-term wear on springs and odds of failure - and we all know that the second someone drops a 15rd mag, guys will slap extensions on them and they will become 18-19rd mags.

If you can't get through a stage with 12-13 round mags, there are problems that go further than your mag capacity...
 

hlee

Sergeant
Belligerents
Minuteman
Jul 14, 2012
4,090
3,977
42
TX
Ruger precision rifle takes AR308 style Pmags. 25 rounder with Taran tactical 5 round extension because, "Fuck a mag change, right?"
 
  • Like
Reactions: gebhardt02

dgheriani

Private
Belligerents
Minuteman
Feb 10, 2017
487
203
I've run the MDT 12 round mags as long as they've been in existence and have never had an issue with 6 & 6.5 Creed and .308. Most of mine don't have the binder plate although my oldest one does (as they all did at that point). One of the huge plusses of the MDT 12 rounders is that you get 2 extra rounds in the same form factor as an AICS or Accurate mag with no need for an extension.
 

Tweedycarcass23jonb

Sergeant of the Hide
Hessian
Belligerents
Minuteman
Mar 5, 2017
315
126
SW Idaho
No, AW's do not have a removable bottom plate
Any way, if you already have AW's and use them you will probably abandon them after a while.
someone did reply the next day with the same answer. I’ve used them for 4 years now, and I’m not seeing a benefit to ditching them. Is there something better in your opinion?
 

accurate obsession

Private
Belligerents
Minuteman
Aug 8, 2017
166
117
someone did reply the next day with the same answer. I’ve used them for 4 years now, and I’m not seeing a benefit to ditching them. Is there something better in your opinion?
I used them for several years myself, mostly casual shooting. I liked the compact size. When I got interested in competition the bugs showed up. How it was explained to me by someone in the firearms industry is that the AW's (stagger stack) were designed for a receiver with three bolt lugs, the lugs picking up rounds from the mag are oriented at 5 and 7 o'clock just like the rounds in the mag, basically. Two lug action, lug is at 6 o'clock catching a small piece of the round in an AW mag, fully catching a round from an AI mag (center feed). SOME rifles will run AW's no problem, BUT tolerance stack-up and rapid bolt operations under stress will cause many to misfeed and or over-ride next round and of course that always happens at the worst possible time. Sorry about writing a book, but that's my experience.
 

Tweedycarcass23jonb

Sergeant of the Hide
Hessian
Belligerents
Minuteman
Mar 5, 2017
315
126
SW Idaho
I used them for several years myself, mostly casual shooting. I liked the compact size. When I got interested in competition the bugs showed up. How it was explained to me by someone in the firearms industry is that the AW's (stagger stack) were designed for a receiver with three bolt lugs, the lugs picking up rounds from the mag are oriented at 5 and 7 o'clock just like the rounds in the mag, basically. Two lug action, lug is at 6 o'clock catching a small piece of the round in an AW mag, fully catching a round from an AI mag (center feed). SOME rifles will run AW's no problem, BUT tolerance stack-up and rapid bolt operations under stress will cause many to misfeed and or over-ride next round and of course that always happens at the worst possible time. Sorry about writing a book, but that's my experience.
I appreciate the detailed explanation. If I do run into issues believe me I’ll be switching.