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  #1  
Old 05-06-2016, 10:55 PM
gwfrench gwfrench is offline
 
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Default 30 carbine load testing

I chronographed my M1 Carbine reloads with a Chrony chronograph.
I was curious about difference between CCI 400 and CCI 41 primers
since nobody ever states what primer was used for their loads.
Hodgdon H110 powder
Aguila once fired brass
Hornady 110g FMJ bullets
Five round groups
Carbine cycled normally with all loads

13.0g, CCI 400 1781fps, SD 18fps
14.0g, CCI 400 1871fps, SD 12fps
15.0g, CCI 400 1962fps, SD 22fps

14.5g, CCI 41 1988fps, SD 22fps
15.0g, CCI 41 2037fps, SD 23fps
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  #2  
Old 05-07-2016, 01:37 AM
rcolarco rcolarco is offline
 
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And the most accurate was.......?
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  #3  
Old 05-07-2016, 07:49 AM
Vic in Va Vic in Va is offline
 
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Interesting.

Though not as predictable as single-based powders, it looks like the primer is good for .7 grain H110.

In other words, that's about how much the primer change raised pressure.

And, looking at SD, your regular primers seem to be fairly uniformly igniting that notoriously hard-to-light H110.

I have 3 cartridges that I use H110 in, .44 Magnum, .30 Carbine, and .458 SOCOM. You've just given me a reason for a couple of trips to the range....(grin)
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Old 05-07-2016, 02:09 PM
sunray sunray is offline
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"...difference between CCI 400 and CCI 41 primers..." The 41 is a magnum primer you do not need and the 400 is a standard primer that'll work just fine.
13.0 is a full grain under minimum too. According to Hodgdon. Mind you, they used a 20" barrel.
Tried H110 when I was working up my load, long ago. Found IMR4227 to be more accurate.
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Old 05-08-2016, 09:01 AM
tcostakis tcostakis is offline
 
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I don't have a chronograph because the range where I shoot doesn't allow them so I found OP's results interesting.
I currently load 14.5gr of H110 and use the CCI 41 primers which I don't want to change. His results showed 1988 fps with this combination. The question I'd like to ask is whether it might be wise to drop my load to 14.0-14.2gr in order to more closely match the spec velocity of 1950fps. My concern is wear and tear on my carbine. When I did my load work up I laddered 14.0-15.0gr in 0.2gr steps. All of them functioned properly and I couldn't tell much difference in accuracy so I split the difference and settled on 14.5gr. Should I do some further load testing between 14.0 and 14.5gr? As I mentioned, wear and tear is my major concern.
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Old 05-08-2016, 02:54 PM
rcolarco rcolarco is offline
 
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Quote:
Originally Posted by tcostakis View Post
As I mentioned, wear and tear is my major concern.
I don't think I would lose any sleep over someone else's data based on five shots.
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  #7  
Old 05-08-2016, 05:22 PM
cranehunter cranehunter is offline
 
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Quote:
Originally Posted by tcostakis View Post
I don't have a chronograph because the range where I shoot doesn't allow them so I found OP's results interesting.
I currently load 14.5gr of H110 and use the CCI 41 primers which I don't want to change. His results showed 1988 fps with this combination. The question I'd like to ask is whether it might be wise to drop my load to 14.0-14.2gr in order to more closely match the spec velocity of 1950fps. My concern is wear and tear on my carbine. When I did my load work up I laddered 14.0-15.0gr in 0.2gr steps. All of them functioned properly and I couldn't tell much difference in accuracy so I split the difference and settled on 14.5gr. Should I do some further load testing between 14.0 and 14.5gr? As I mentioned, wear and tear is my major concern.
Range doesn't allow chronographs? I am curious as to the why?
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Old 05-08-2016, 07:21 PM
rcolarco rcolarco is offline
 
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Quote:
Originally Posted by cranehunter View Post
Range doesn't allow chronographs? I am curious as to the why?
Too much setup time (by people who do not know what they are doing). Delays everyone else. I can set up a chrono in nothing flat, but apparently others cannot. On the rare occasions I use a (borrowed) chrono, I do not try to shoot for velocity and group simultaneously.
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  #9  
Old 05-10-2016, 08:59 PM
Dusty31 Dusty31 is offline
 
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Quote:
Originally Posted by rcolarco View Post
..... I do not try to shoot for velocity and group simultaneously.
Me either. At least not since I watched a guy shoot his chrony trying to do just that.
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  #10  
Old 05-10-2016, 09:04 PM
Dusty31 Dusty31 is offline
 
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Interesting data, thanks for taking the time to post your results.
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