9mm Carbine Loads - Alliant Power Pistol & Accurate #7
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- Опубліковано 16 жов 2024
- Been wanting to develop some high density loads using some slow-ish handgun powder that will take full advantage of the long 16-inch barrels on these 9mm carbines.
These heavy loads of relatively (for 9mm) slow burning powder would not be very good in a typical handgun with their comparatively short barrel length.
Understand that the loads you see here are hot. Although I have found multiple sources that list these loads as within safe pressure levels, they are above the powder manufacturer's published maximums. These loads were developed and powder dispensed in a manner that greatly reduces the risk of an overpressure situation - no automatic powder measures. These were done on a loading block one at a time using a precision Redding powder dispenser and a precision beam scale.
Every handload must be worked-up for the particular firearm it is intended to be fired in. This video shows loads developed for this particular 9mm carbine and they are not necessarily safe for your application.
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Cool gun in what appears to be some "cool" weather, too.
I currently load 9mm for my 9mm AR-15. I use Accurate #2 powder, CCI Small Pistol Primers, Brass Case, topped with Berry's 115 grain plated bullet. They shoot extremely well and lethally accurate. I did load some Hornady 115 grain XTP hollw-points for it and got great results using .01 grains shy of the max load.
Sweet old SMG, I've never seen one of those in the real world. Thought that they were the stuff of myth and legend, you always have another surprise in the collection to share with us- thank you for taking us along.
You can really walk fast ;P
nice chamber stretchers there..cool gun,was those sand/dirt cuts on the bolt carrier..remind me next time to bring a heavier jacket..
Looks like some good loads and some nice shooting. Love the diet coke can at the begining of the video.
What a great looking carbine, and you're pretty accurate with it. I miss the snow, haven't really had much in the 4 years I've been in OK.
@TheLegumMagister Thanks for the tip. I would imagine that self-chambering would be quite loud on an open-bolt SMG!
These semi-auto conversions are somewhat less reliable than the un-adulterated version you got to operate. Sometimes, if the trigger isn't quite back far enough, like when carefully shooting from a rest at a distant target, the sear will miss the striker and not reset for the next shot. Wish mine were a registered original, what a blast that would be, short barrel and all!
Those British side loading smgs, always look so cool.
@TangoDownProduction You bet, 9mm is an awesome cartridge! People who don't respect it are probably judging it by it's physical size and are unaware that it is an extremely efficient package that was way ahead of it's time when introduced at the turn of the century. These little pills have all sorts of accuracy and velocity capability in the longer barrels and a premium 124-gn hollow point at .357 Mag velocities is a very effective one-shot-fight-stopper at self defense distances.
@darbycrash55 No, the gun is heavy enough that I don't notice it at all. Guess the pistol grip gives good leverage because I never even thought about that before. You would think that it would twist. Maybe 34-rounds of 9mm ammo just doesn't really weigh enough to do that.
Looks like you found a load the sterling likes. Nice shooting brother.
@TangoDownProduction With that fast powder they must be very accurate. Bet those loads are super-clean burning - I would think the bullets would be close to the point where they decelerate before they reach the muzzle with your long barrel and fast powder combination.
It'd be fun to experiment with your fast powder method as an accuracy load for XTPs using the chronograph and dial it in by adjusting the load and seating depth for the lowest standard-deviation.
@hempseedaddict Incidentally, that wasn't the can that I blew all the good test ammo on after I was done chronographing. That was one of the last shots I did with some relatively low velocity 147s. The can that I shot with the fast 115s was totally shredded and danced almost half way to the 100 yard berm across the snow. It was really fun, should have rolled video for that.
That is some serious steam for a 9mm.
Why not a stick type rifle powder? Would that be too dangerous? Im sure there's some 9mm bull barrels for ar15s that would handle it.
@ArtisanTony Once a UA-cam shooting channel has been established it is wrongful for the owner of said channel to operate a firearm without a video camera recording for the entire duration of each shooting session. Thought you knew that!
@tnoutdoors9 Not sure of the actual pressure or if they would fall into the "plus" catagory. The high velocity is simply from taking advantage of the extra barrel length by using slower powders, and lot's of it. These rounds would not be efficient in a 4" barrel but I bet the fireballs would be spectacular.
Might try 124s and 147s in a carbine loading but the pressure curve get's pretty sharp when trying to get those heavier slugs up to top speed.
Really nice shooting with a very unique gun! Looks like a lot of fun to be out there shooting a nice carbine like that. KGB, do you find that firearm difficult to "sight" being that you have to hold the thing steady by gripping the magazine from the side? I was always curious if these things were difficult to hold on target or not? Good shooting btw, it sure makes being out in the cold much more tolerable when the lead is flying!
@firefox8192 I don't know, mostly just to save money on ammo I guess. Didn't really like that short little barrel or the continuous racket whenever the fire control lever was pointing at the letter - "A". ;-)
It would be interesting to see the chronograph results of your loads in warmer weather...85+ degrees or so.
@ReDact45 Been losing sleep thinking about taking them beyond 1600 FPS out of the long barrel but I don't really want to operate without a safety margin. I'll even back these down a couple notches so that I don't have to make them one at a time on a loading block - takes forever.
@tnoutdoors9 The data that I used did not refer to these as +P but it would be interesting to determine what loads fall under that category. It would be fun to do a velocity comparison with some different barrel lengths. Not for any practical purpose, just for the sake of comparison. My guess is that a load that produces 1500 FPS in a 16-inch barrel would probably not even reach 1300 FPS from a 4" tube.
@jamaicanjjason Pretty good for a morphodite SMG turned semi-auto. Occasionally it trips up and log-jams in the receiver, about the same as my UZI semi-auto. Come to think of it, though, it seemed to run 100% on that Accurate #7 load. Carbines like a little more impulse than cheap practice ammo offers.
@phishst1cks Those things are pretty sharp, too! Like handling a big drill bit.
Thanks for not complaining about the cold - heavier jacket and maybe don't wear shorts next time.
does the mag weight bother your hold when its full?
@joe2020jack Accuracy is pretty similar to what you would expect from an off-the-rack Ruger 10/22, which is to say great for a modified sub-gun.
@theKGB65 You are correct, I get great accuracy from that load data. I have some 124 gr round nose bullets that a friend of mine gave me to try out. I haven't shot them yet, but for some reason my 9mm AR loves the 115 gr bullet. A lot of people give the 9mm a hard time, but from the results the XTP's have shown, I don't think anyone would want to stand down-range and catch them for me. :-)
Why would you want to convert the British Sterling to semai-auto?
That appears to be a conservative load.Speer shows AA#7 8.6-9.6 grs. behind a 115gr bullet. CCI 500 primer.
No, but if I ever get around to working up loads for the 9mm again I'll definitely chrono a 4" Glock with the 16" carbines. That would make good video material.
My data is an unfortunate mess of scattered spiral notebooks.
@72cmcinc Thanks, I'll do more of that sort of thing in the future.
@ndcouey70 Yea, it ran quite well and hit more like a magnum handgun than a typical Parabellum.
@1AbominAble1 That was actually my run-speed, but thanks. haha.
@floridafyme That might be, here's what I copied directly from Accurate Powder's published data:
No 7 115 NOS JHP 6.4 994 7.5 1,127 33,684
No 7 115 SIE FMJ 6.7 1,049 7.8 1,171 34,821
Yes! That's what I loaded. Big fireballs! I'm considering backing down. Way down. Sick numbers. Thank you
@ITHINKUREALESUK That should qualify as the requisite, "don't sue my ass off if you blow yourself up!" - announcement.
Am I missing somehting, I’m fairly new in this area. But 8.5 grains of Accur-7 seems pretty hot at 115 jhp
Any answer I might give should not matter to you because every load has to be systematically worked up for each individual firearm using a reputable published data source such as Lee, Hornady, the various powder manufacturers, etc.. We can't rely on other shooters for load recipes. It's always better to keep your foot off the gas when handloading. Strive for reliable function, accuracy, and clean burns that don't stretch the brass too much, and always within published specifications including case length and bullet seating dimensions. Reloading manuals are what make this hobby fun.
The Lee Modern Reloading book is a favorite.
@@theKGB65 thanks. I own just about every manual there is, which is why I asked my question...
Find this load in your Hornady 9th Edition manual.
@@firearmretreat
@OilTheGun This was a heatwave for January. We got lucky this winter up here in... wherever this is - the land of the stupid (because we aren't smart enough to move south).
who uses vihtavuori n350 slow handgun powder ? 9mm reloading . 115 gn 5.7 gn load AOL 1.140
@hickok45 Cool, man! Actually it's pretty darn nice out for January.
@snoozer987 Makes me feel obligated to shoot prone.
Thanks
@ikillliberals45 Me? No, I always take my time.
@theKGB65 LOL, exactly!
The Sterling had like a 7-8'' barrel on the original sub gun. When your rifle was rebuilt to make it BATFE legal, was the barrel replaced with a 16'' rifled barrel, or did they just add another section of tubing, welding it on to the old barrel to make it legal?
These come with a brand new rifle-length barrel manufactured by Wise Lite Arms.
Thanks for the quick response. I've a K-31 Soumi and all they did was add a 4" tube to the muzzle to conform to BATFE.
What do you mean? "Haven't been making videos?" WTF :)))
@theKGB65 ...lol...knocked this one of the park..over the head anyway