can i use N320 with the Campro 147gr projectiles? i dont see that powder listed in any of the published data that i have access to. if so, what would be a good starting charge weight? im looking to use this for ipsc minor with my Shadow 2.
Campro 9mm 147gr RNFP with N320 ?
- Thread starter thechineseguy
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i will chrono that load and play around. thanks!
what gun?
shadow 2
If you have multiple guns in the same caliber, that's a lot of work. I'd prefer to start with a COL suggested by the bullet manufacturer if they have it, and just plunk test it in each barrel.
The manufacturer would consider things like ogive and length of the bullet, as well maintaining correct case volume. I did some testing when I started working up my 9mm loads, and found that the case volume added by additional COL decreased the resulting bullet speed.
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Why? Just load to the COL of the shortest barrel. I agree with 4n2t0, you should never use the COL's listed in data or manuals. The fact is that they haven't tested that bullet in every single barrel (most times they've only tested it in one, a universal receiver). Even CamPro's listed COL doesn't work in my PPQ, I need to load to 1.08.
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my chrono results from today out of my Shadow 2....
Campro 147gr RN with 3.5gr N320 = 894, 893, 907, 906, 905 FPS = 132 PF
Campro 124gr RN with 3.9gr N320 = 990, 991, 1010, 1000, 1014 FPS = 124 PF
Campro 124gr RN with 4.1gr N320 = 1035, 1067, 1063, 1073, 1061 FPS = 131 PF
Frontier 124gr RN with 3.9gr N320 = 964, 996, 1005, 1010, 1005 FPS = 123 PF
Frontier 124gr RN with 4.1gr N320 = 999, 1045, 1044, 1047, 1049 FPS = 128 PF
Campro 147gr RN with 3.5gr N320 = 894, 893, 907, 906, 905 FPS = 132 PF
Campro 124gr RN with 3.9gr N320 = 990, 991, 1010, 1000, 1014 FPS = 124 PF
Campro 124gr RN with 4.1gr N320 = 1035, 1067, 1063, 1073, 1061 FPS = 131 PF
Frontier 124gr RN with 3.9gr N320 = 964, 996, 1005, 1010, 1005 FPS = 123 PF
Frontier 124gr RN with 4.1gr N320 = 999, 1045, 1044, 1047, 1049 FPS = 128 PF
Different strokes for different folks I guess. I'm lucky that the Campro 1.090 COL works great in my Grand Powers, 1911's,CZ Shadows, Glocks, and 929's. I've run my reloads in a PPQ and PPQ Match as well without a problem, but maybe the chamber in your PPQ is different.
When you go shorter than the manufacturers COL, just be wary that the reduced case volume will increase case pressures and potentially a compressed load, so work up your load accordingly and keep an eye out for pressure signs.
I love compressed loads, I'm not sure why everyone seems to be scared of them. Here's what Hodgdon has to say about it:
COMPRESSED LOADS
Normally a pistol or rifle shellcase is considered full, or 100% loading density, when the powder charge sits at the base of the bullet when the bullet is fully seated. It is possible with some powders and cartridges to increase the powder charge slightly above this point, such that when the bullet is seated it actually compresses the powder charge slightly. This condition is known as a compressed load.
Hodgdon notes in its reloading data if the subject charge is a compressed load. A full case, or lightly compressed charge is an ideal condition for creating loads with the most uniform velocities and pressures, and oftentimes, producing top accuracy
Interesting note, thanks for sharing
I've got some 9mm loads worked up that are slightly compressed (124gr Campro & 4.0gr N320, 124gr Campro & 7.4gr Longshot). I did notice the ES was much smaller for those reloads.I think the key here is "lightly compressed". An extremely short COL could result in too much compression, and also the resulting reduction in case volume could raise case pressures to dangerous levels. On the other hand, increasing case volume by using a longer COL will decrease case pressures, so you would need to up your powder charge to compensate. I'm cheap, and go through 50k rounds a year. I'd prefer to optimize my powder charge and use as little as possible
