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Old September 15th, 2011, 01:26 PM #1
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147gr 9mm Subsonic Load Data - Anyone else want to share?

I just picked up some Montana Gold 147gr CMJ's (Complete Metal Jacket) for a subsonic load Im gonna work on to be used with a SilencerCo Osprey 9mm suppressor. I dont have the suppressor yet as the ATF takes a friggin long time for approval, but I wanted to make a test batch to see how they functioned. I'll be testing them in my Glock 17 and Sig P226 Elite which the suppressor will be used on once its approved. So I loaded up 20 test rounds with 3.3gr's of Titegroup and Winchester small pistol primers at an OAL of 1.135. They should be around 915-925 fps. I hope to get to the range this Saturday to test them out.

So, Im just curious, does anyone else have a 9mm subsonic load they want to share?
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Old September 15th, 2011, 01:51 PM #2
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I like to use accurate no 7 as you can push it a wee faster as the pressure curve is more gradual than with a faster burning powder. This allows a gradual build up in the barrel without exceeding cup pressure. It is best to look at the load data and use a chronigraph while looking for pressure signs.
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Old September 15th, 2011, 03:05 PM #3
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Agreed. The load Im using is the starting load for the particular powder. As long as it stays subsonic, which Im sure it will, and is accurate enough through my hosts/suppressor, I'll just leave it as is.

I might also refine the load for accuracy at a later date. But that will be for my G34 which I wont be shooting suppressed.
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Old September 15th, 2011, 11:11 PM #4
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Your Titegroup load should work well for you.
I used that load for a while but I think I may have been at 3.4gr.
I switched to 3.4gr VVN320 because it is so much cleaner than Titegroup and has a much lower muzzle flash.
OAL 1.131 with a ZERO 147gr JHP and a Federal primer.
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Old September 16th, 2011, 09:43 AM #5
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Are you buying the N320 locally or online? It's a pricey powder, but I've also heard it makes a great subsonic load. I might have to try it out one day.
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Old September 16th, 2011, 10:15 AM #6
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Subsonic load

I've used 3.9 gr W231 under Speer Gold Dot 147 gr JHPs for pin shooting. The 3.9gr is a max load in the Lee manual, but a sheet included with the bullets took it up to 4.2 gr. I have no idea of the velocity, I was at that time a member the "heavy and slow" school of pinshooting.
I would follow molonlabe's caveat, use a chronograph and watch for pressure signs.
I have heard that the 147's may not be as accurate as 115's in some firearms because the heavier bullets don't stabilize as well (this is hearsay, a friend noted the difference in accuracy from a ?Ruger carbine). From a shorter suppressed barrel, the difference may not be significant at the usual ranges.
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Old September 17th, 2011, 04:42 PM #7
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Quote:
Originally Posted by Flipz View Post
Are you buying the N320 locally or online? It's a pricey powder, but I've also heard it makes a great subsonic load. I might have to try it out one day.
I ordered my last 4lb when I needed some other stuff as well to make hazmat worth it.
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Old September 17th, 2011, 10:39 PM #8
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Went to the range today and shot my test rounds. They were 100% in both my P226 Elite and my G17 with no signs of overpressure. Gonna load up another batch and hopefully make it to the range again tomorrow.
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Old September 18th, 2011, 05:50 PM #9
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I load 147gr Hornady HP/XTP with between 6.0 gr and 6.3 gr of AA No.7 (depending on if I'm reloading for my 16" 9mm AR or my Glock 17).

I don't have a chronograph, so I don't try to get to close to the speed of sound. That way they work in all seasons and temperature ranges. Speed of sound at 68 F is 1126 ft/s and 1,088 ft/s at 32 F.

I used this data to estimate that a 16" 9mm AR barrel adds about 100 ft/s to the data listed in my Hornady manual (their data is for a full sized pistol, I believe).
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Old September 22nd, 2011, 06:51 AM #10
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147 gn rainier rn,3.5 gn bullseye,1.190 oal.rockriver ar 16" barrel with yhm can.very quite and accurate at 100 yd.case lenth and oal matters.
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