New SDS 10 Round Magazines At The Range – They Worked Great

As you may have read, my first range session with my new SDS Lynx shotgun didn’t go very well when I used new untested 10 round SDS brand magazines.  I posted my findings and David Fillers of SDS immediately reached out to me to address the issue.

David told me they did have a few quality control problems early on and that he wanted to replace my four magazines.  Note, David said they have sold over 3,000 magazines with just a few problems  and given that I haven’t heard or read about others having problems, it must have just been bad luck for me.  At any rate, I was impressed that he reached out so quick and a few days later the replacement magazines arrived.

To make sure I didn’t have further problems, they had opened each package and tested the followers, which I appreciated.   Let me tell you, the difference was night and day.  The replacement magazine followers were much looser as they approached the top of the mag and felt great from the start.  Exactly what I would normally expect.  Of course, this then begged the question of how would they perform?

About a week after that, I finally got a chance to take the Lynx and the new magazines to the range.  I could tell the Lynx was still wearing in.  Whenever you have a weapon with parkerizing, it is to be expected.  We put about 25 rounds of 2-3/4″ Remington 00 buckshot through it the first time and then I put about 70 more through on this trip.  I’d say somewhere between cumulative round 40-50 (meaning from the fist session and this one), the SDS really started to smoothen out.

How could I tell?  It was cycling faster and it was kicking rounds out very aggressively so I turned the gas port down from wide open to the third widest setting.  I bet I can turn that down again for these higher-power rounds in the near future.

Those 12 gauge rounds are stout.  It’s been years since I shot more than 25 in one session so I was feeling it.  You’ll also notice that my JMAC brake loosened up.  I had hand tightened the jam nut and forgot to secure it with a wrench.  I fixed that problem as soon as I got home.

At any rate, the new SDS 10 round magazines worked great especially once the action started smoothing out.  I tried them all the way full with 10 rounds as well as starting with only five rounds.  I also fired both buck shot and some Brenke slugs.  Thus, I’m happy to report that the SDS magazines appear to be good to go.

There is a good lesson here for all of us – including me – definitely test your gear before you need to rely on it.  Thankfully this was just me getting embarrassed by my buddies at the range razzing me vs. a critical situation.

Now, I next need to point out that I took the CSSpecs magazines with me also and all they did was jam so I need to contact those folks and work on them next.


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