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Gatorcountry
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Posted: 7/28/2010 11:25:05 PM
Thought I would share the results of my load testing for one of my service rifles. The one I used for this testing is a CLE service rifle with a SS Douglas barrel having a 1/8" twist. The rear sight is one of Frank's 1/4 MOA with a .036" insert. All testing was done on the same day at 100 yards, shooting prone with a sling. Slight to medium wind blowing from left to right.

For each test load I shot 3 strings of 5 rounds, switching magazines between each string. I let the rifle cool some after I finished shooting one group of 3 strings. All loads used various weights of Reloader-15 sitting under a 69gr. SMK. bullet using WCC brass and CCI BR4 primers. COAL was 2.250". Each charge was dropped into a scale pan and then weighed. For the most part, the ES stayed below 50 with a couple at or below 20.

23.5gr String 1 String 2 String 3
One 2675 2713 2713
Two 2739 2747 2728
Three 2749 2743 2717
Four 2739 2756 2724
Five 2739 2721 2719




High 2749 2756 2728
Low 2675 2713 2713
ES 74 43 15
Mean 2728 2736 2728
SD 30 30 20




24.1gr String 1 String 2 String 3
One 2735 2794 2793
Two 2795 2784 2771
Three 2753 2769 2762
Four 2785 2775 2774
Five 2785 2790 2795




High 2795 2794 2795
Low 2735 2769 2762
ES 60 25 33
Mean 2770 2782 2779
SD 25 10 14




24.4gr String 1 String 2 String 3
One 2831 2790 2810
Two 2813 2833 2834
Three 2807 2818 2865
Four 2799 2809 2838
Five 2818 2823 2844




High 2831 2833 2865
Low 2799 2790 2810
ES 32 43 55
Mean 2813 2814 2838
SD 12 16 19




24.7gr String 1 String 2 String 3
One 2905 2857 2833
Two 2873 2853 2856
Three 2852 2864 2871
Four 2857 2866 2858
Five 2858 2880 2850




High 2905 2880 2871
Low 2852 2853 2833
ES 53 27 38
Mean 2869 2864 2853
SD 21 10 13




25.3gr String 1 String 2 String 3
One 2881 2912 2889
Two 2909 2914 2932
Three 2911 2925 2915
Four 2916 2910 2930
Five 2928 2928 2927




High 2928 2928 2932
Low 2881 2910 2889
ES 47 18 43
Mean 2909 2918 2919
SD 17 8 18

Some pictures of the targets with load data written on them:










More testing coming up!


"The greatest enemy of knowledge is not ignorance, but Illusion of knowledge." Stephen Hawking
Scotts556
...........Thats the idea..................
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Posted: 7/29/2010 12:04:48 AM
I was runing 24.5 of RL15 in pmc brass, cci 400 and 69 SMK. good stuff right there. GOOD groups man!!!!!!!!
Thanks to all the men and women who have served and who are serving. God bless our troops and may they all come home safely.
EWP
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Posted: 7/29/2010 12:15:04 AM
Looks like the 24.1 group is the best but I would like to see even that 15 round group shrink by allot before deciding on a load.

Good work though.

Are you using a crimp of any kind? if so i would load the next one without a crimp.

Are you deburring the flash holes and what sizing die are you using?
glorifiedG
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Posted: 7/29/2010 12:25:59 AM
Those look like eight pounders.You will be our expert by the time those are done.
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Gatorcountry
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Posted: 7/29/2010 6:55:42 AM

Originally Posted By EWP:
Looks like the 24.1 group is the best but I would like to see even that 15 round group shrink by allot before deciding on a load.

Good work though.

Are you using a crimp of any kind? if so i would load the next one without a crimp.

Are you deburring the flash holes and what sizing die are you using?

All rounds were loaded using an RCBS Rock Chucker with RCBS .223 Competition FL dies. For this testing I setup the die for no crimp as I wasn't worried about set back. The cases were trimmed to length, the case mouth neck chamfered and the flash hole deburred.

I'm thinking the same about the 24.1gr load - looks to be the most accurate for the tested rifle, I just need to work on shrinking the group size down some.

"The greatest enemy of knowledge is not ignorance, but Illusion of knowledge." Stephen Hawking
Gatorcountry
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Posted: 7/29/2010 7:00:47 AM
Originally Posted By glorifiedG:
Those look like eight pounders.You will be our expert by the time those are done.

Actually, each container is five pounds. I try to buy in bulk when I mail order powder to save on the handling and hazmat fees. But it should be enough for me to at least get an idea of what load works

"The greatest enemy of knowledge is not ignorance, but Illusion of knowledge." Stephen Hawking
MARTY9
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Posted: 7/29/2010 8:37:21 AM
ADJUSTING COL SOMETIMES HELPS. THATS ONE MORE VARIABLE TO PLAY WITH.
EWP
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Posted: 7/29/2010 9:47:42 AM
Originally Posted By Gatorcountry:

Originally Posted By EWP:
Looks like the 24.1 group is the best but I would like to see even that 15 round group shrink by allot before deciding on a load.

Good work though.

Are you using a crimp of any kind? if so i would load the next one without a crimp.

Are you deburring the flash holes and what sizing die are you using?

All rounds were loaded using an RCBS Rock Chucker with RCBS .223 Competition FL dies. For this testing I setup the die for no crimp as I wasn't worried about set back. The cases were trimmed to length, the case mouth neck chamfered and the flash hole deburred.

I'm thinking the same about the 24.1gr load - looks to be the most accurate for the tested rifle, I just need to work on shrinking the group size down some.



Try 24gr's even at 2.260" COl and see if that tightens things up a little for you.

Good luck,
EWP
dryflash3
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Posted: 7/31/2010 12:01:15 AM
Good post, I am a fan of Re-15 and the Sierra 69 gr BTHP also.
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AeroE
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Posted: 7/31/2010 7:17:17 AM
Try 25.0 grains with the Sierra 69 grain bullet.

I'm a little surprised at the vertical stringing with 25.3 grains. Maybe try shooting a series again starting with a maximum load, then working down so you're shooting when you're not tired. 25.3 grains should be showing some pretty high pressure signs, too.

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As for me, I will embrace what is Right more tightly than ever.


1 lbf = 32.174 lbm-ft/sec^2
Gatorcountry
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Posted: 7/31/2010 6:36:53 PM

Originally Posted By AeroE:
Try 25.0 grains with the Sierra 69 grain bullet.

I'm a little surprised at the vertical stringing with 25.3 grains. Maybe try shooting a series again starting with a maximum load, then working down so you're shooting when you're not tired. 25.3 grains should be showing some pretty high pressure signs, too.


Aero,

I was very surprised by the results as well. After seeing the first two groups, I thought the heavier loads would really put a smile on my face. And you are right, my eyes (and elbow) were getting tired by the time I started the 25.3 group. What really surprised me the most was the velocity of the last group. Based on my 5th edition Sierra reloading guide, I was trying to duplicate their 25.3 load. The chart shows 2750, so I was thinking I would land somewhere between 2750 and 2800. I was really surprised to see almost every shot above 2900. Now I'm glad I stayed away from the 25.7 max load (which shows 2800 fps in the chart).

I'll start out next time at 25.0 grains and work down to 24.0.


"The greatest enemy of knowledge is not ignorance, but Illusion of knowledge." Stephen Hawking
jlow
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Posted: 7/31/2010 7:10:49 PM
[Last Edit: 7/31/2010 7:11:17 PM by jlow]
I did a similar thing with the 52 grain SMK in my M&P-15 VTEC 1:7 and found that the sweet spot was 24.0 grains. Gone as high as 27 grains but was getting flat primers with my CCI400s.
vedubin01
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Posted: 7/31/2010 8:29:35 PM
I just loaded some Nosler 69gn CC with RE15 and CCI400 primers, working up a new load.

I hope to make it to the range tomorrow to see how these loads worked out.


loaded 10 of each...

24.4gn
24.7gn
25.0gn

2.255 OAL

Hope to post results tomorrow.
Gatorcountry
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Posted: 7/31/2010 9:15:51 PM

Originally Posted By vedubin01:
I just loaded some Nosler 69gn CC with RE15 and CCI400 primers, working up a new load.

I hope to make it to the range tomorrow to see how these loads worked out.


loaded 10 of each...

24.4gn
24.7gn
25.0gn

2.255 OAL

Hope to post results tomorrow.

Great - I would like to compare results, especially the 25.0gn

"The greatest enemy of knowledge is not ignorance, but Illusion of knowledge." Stephen Hawking
vedubin01
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Posted: 7/31/2010 9:25:12 PM
I dont have a crono, but Ill post up the groupings....

maybe santa will be good to me this year!
vedubin01
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Posted: 8/4/2010 3:10:11 PM
well I made it to the range today and was a bit disappointed in the loads I worked up.

I loaded

Re15 with Nosler 69gn CC with CCI400 primers, all PMC brass.

25.0 - 24.7 - 24.4

Out of the 3 loaded the 24.7 was the best but still out of sub MOA range. Alliant does show max being 25.5, I might work up closer to max to see if anything changes for the better.

I was going to take pictures but after I shot my rounds I had a lady next to me claim my target as hers and trashed the photo opportunity. Ill be out again.

So far out of my rifle and with the 69gn Noslers, H335 powder has been the best for me.