The +3 magguts kit for the 10rd 9mm Shield Plus magazines works for the 13rd Shield Plus 30sc magazine. It gives you 17rds of capacity according to a FB 30sc group post I saw. It was tested with 200rds and had zero malfunctions per the post.

I bought one after I saw the post and it definitely gave me 17rds in the magazine. The +2 for the 13rd 9mm magazine was out of stock, otherwise I would have ordered one of them to throw in my 16rd 30sc magazine. I'm guessing that would give me a 19rd capacity.

17+1 or 19+1 rounds of 30sc HST in a Shield Plus is outstanding firepower for anybody. I lose nothing in penetration or expansion against any 9mm rounds from all the gel testing videos I've seen with the 30sc HST. I've carried 147gr 9mm HST for years and that has 21 ft/lbs less energy than my 100gr 30sc HST. That's straight from the HST ammo boxes.

People are listening to way too much online ******** about the 30sc round. If you follow the anti 30sc logic, then all of you should throw away your 9mm guns and go back to the 40 and 45, since 9mm has less energy and expansion than both of them.

Per the box...what about the Chrono? Ammunition manufacturers are famous for test barrels that are longer than normally used for a given cartridge.

I'm excited for you about your gun and caliber. I'd advise that you buy up all of the ammunition that you can. The caliber drying up and dying is a real concern. I wonder if you can get a replacement barrel for .380 or .32 ACP if all goes south.

__________________
This≠DodgeCity&You≠BillHickok

Another 30SC fan here. Thanks for the heads up on the Magguts, definitely going to try them. I don't listen to all the naysayers but do get a kick out of most of them parroting the same line, "30SC is an answer to a question that nobody asked". That's where they're wrong. They were falling all over themselves get a P365 when they first came out, then the same for the Shield Plus in 9mm. Why?, capacity. The 30SC allows even more capacity with the benefit of being a more accurate cartridge with the same or even greater energy than the 9mm. The 100gn XTP 30SC handloads I carry in the Shield have 360#'s of energy, but I've loaded and tested them to 380-390#'s while remaining within Hodgdon's data.

Video posted showed a guy gel testing HST rounds in 30sc, 9mm +p, 40, 357sig, and 45acp. The 30sc penetrated the furthest out of the group and expanded like a typical HST round, meaning excellent. The only bullet that looked significantly bigger expanded than the other HST's was the 45.

Exactly what I've been reading and seeing online. Like 10mm factory loads, 30sc from the factory is tamed down and can achieve better than 9mm energy ft/lbs. My Shield Plus 30sc already recoils noticeably less than my 9mm Shield Plus, so getting 3-4 more rounds of capacity in the same exact size gun is by default, the exact reason 9mm won over the 40 and 45. And with 9mm, people only got 2 more rounds of capacity over a Glock 23........15 instead of 13.

Ft/lbs of energy is not particularly important for handgun terminal ballistics if it doesn't result in a larger wound cavity through expansion and/or penetration depth.

However, .30 SC seems to do as well as plenty of 9mm rounds when it comes to penetration and expansion, making it perfectly viable as a carry round, and in a Shield Plus, you get an extra 3 rounds of .30 SC.

When it comes to concealed carry self-defense shootings, reloads almost never happen, so capacity matters. I can't tell you how many rounds you'll need in a defensive shooting; everybody's ability varies, and common threat levels vary. Maybe criminals by you tend to run solo, or maybe you live in or around Chicago, where carjackers run in crews of 4+.

I would've preferred that .30SC be a modernized, rimless .32 ACP with a little more zip to make it a better pocket pistol round than .380 ACP. However, I can see the argument that a lot of shooters consider 9mm to be the floor for terminal effectiveness, so the designers probably wanted a round that would at least match that.

OP.... you said the words that unleash the Flaming Dragons.

Be ready for a torrent of Super Carry Derangement Syndrome that will break the internet.





Haters Gonna Hate

Now compare .32 ACP to 5.7x28mm and really enrage the tacticool crowd!

I've got plenty of 9mm stack and a half guns, so an extra caliber is not a problem for me, especially in a gun I already own, the 9mm Shield Plus. Avidity Arms posted a video of a prototype stack and a half 30sc PD-10 that the owner Rob Pincus was shooting. He fired off 21 rounds of 30sc and it looked like he was shooting a 5.7 with how little recoil I was seeing.

I'll take a 21 or 22+1 30sc pistol loaded with HST's for self defense anyday. Even my Sig Macro magazines would probably take 21-22 rounds of 30sc. It's a good round and is not going away specifically because it's a good self defense round.

That xtp load with 19" of penetration and 380+ ft/lbs of energy looks like a great self defense round. That's 9mm +p territory.

My experience with aftermarket magazines and floor plates designed to allow more capacity than the factory parts has been they are not as reliable. Most of that came from trying to increase the 6 round capacity of a Glock 43. I tried some magazines and floor plates the internet said were 100% reliable but once every 100 rounds or so would have some sort of failure to feed that never happened with the factory parts.

If reliably increasing capacity was as easy as using a different spring and floor plate it seems like Magguts could make more money licensing their technology to companies than they do selling the parts to individuals. Assuming its patented in some way that S&W could not just copy it without paying them.

I have never tried Magguts so maybe they work as well as everyone says. But I am sticking with factory parts from now on. I would really want to put several hundred rounds through a modified magazine before I trusted it and would also want to see if leaving a modified magazine fully loaded for a couple of years caused the springs to fatigue.

Once again, while the internet says only cycling causes a spring to fatigue my real world experience has been different. The coil spring in my Remington 870 became so weak it would not feed the last round after leaving it sitting fully loaded for a few years. I only shot the gun once a year or so and not many rounds, it was leaving the magazine fully loaded that caused the spring to weaken. I think the reason factory magazines do not have problems with springs weakening is they sacrifice a little capacity to avoid over stressing the springs. I have never had a factory pistol magazine fail because the spring weakened even when left fully loaded for many years. Not sure the same will be true of one with Magguts.

Edited to add: I don't own a 30 SC but don't understand why so many people want to see it fail. The Glock 43 was replaced by a Sig P365 because I wanted more capacity.

I went to the range this morning to test them out. I used 4 boxes of blazer and federal range ammo and had zero failures through either of my magguts equipped 30sc magazines. 200 rounds without issue to me is good enough right now. Longevity is another story, but I'll have to wait to see how they last. I do believe the magguts have a patent.

The hate on 30sc is just dumb to me. If anything, it's just another caliber I have for if and when the government takes away all the "military calibers" they're gonna need to wage the wars they want against China, Russia, Iran, and North Korea. We're gonna lose those wars by the way.

I got a Shield Plus in 30SC - my expectations for the pistol were not met (not the round, the pistol). I've been a 1911 guy for decades, and the first thing I considered was the grip angle. Pretty good there. Grip safeties aren't a problem, or so I thought. This pistol has the grip safety pinned at the bottom, not the top as in the 1911. I didn't know that until I got it (through the web). So, the geometry is different when grasped - the 1911 gets squeezed with your whole hand; the S&W wants you to press in the top with just the web between thumb and finger. I sent it in to have it checked out, as it felt like the movement inward was hanging up a bit - asked to have the tolerances checked. Instead they said they ran a couple of mags and couldn't find a problem. You have any problems with yours? Or do you have the Shield Plus, so not the same gear? Like to hear if anyone had/has problems and/or a fix. Tnx

You have the 30sc Shield EZ if you have a grip safety, which has 10rd magazines vs the 8rd magazines in the Shield EZ 9mm. Mine is the Shield Plus which has no grip safety, and the magazines are 13rd flush fit and 16rd extended magazine. Grip safeties I have ZERO experience with. I've never owned a 1911 style gun.

If the springs do weaken over time the most likely failure would be they fail to get the last round up in time for the slide to catch it. The slide instead runs over it and you get a click when you expected a bang. Your 17 round mag would become a 16 round mag which is still better than stock. Worst case you could put the factory spring back in if you start having problems a few years from now.

I am still sticking with factory magazines but do not want to overstate the risk of the Magguts springs fatiguing over time. It sounds like they are working well for you.