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June 7, 2015, 11:08 AM
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#26 |
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Senior Member
Join Date: April 10, 2012
Location: San Diego CA
Posts: 6,876
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Rebs :
What rifle , barrel length and twist are you using ? As I stated above I'll be shooting H335 for the first time Monday . I worked up five loads using #400 primers . I how ever went out and bought some #450 primers and worked up 6 loads starting .5gr less then the #400 . I'm really looking forward to seeing how much the primers make a difference . I'll be using an AR with a 16" barrel and a 1-7 twist .
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If Jesus had a gun , he'd probably still be alive ! I almost always write my posts regardless of content in a jovial manor and intent . If that's not how you took it , please try again .  
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June 7, 2015, 06:03 PM
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#27 | |
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Senior Member
Join Date: April 10, 2012
Location: San Diego CA
Posts: 6,876
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Well nobody caught my mistake so I'm calling my self out on it .
Quote:
So I started filling out my load data sheets that I take to the range . Thank goodness I had already loaded the H335 using the #400 primers or I would not have caught this . I had loaded those correctly per Sierra manual starting at 24gr . (sierra is 23.6 so I started at 24) . The mistake was I had loaded some IMR 4320 right after that and it had a starting load of 25gr ending at 26.7 . For what ever reason that had me thinking I should start my next H335 loads using #450 "mag" primers at 24.5gr . I had mixed up the charge weights of the two powders in my head and did not consult the manual the second time around , OOPS  . I would have been WAY over max almost right away . Especially when using the #450 primers . My new starting load will be 23gr - .5gr less the the manual ending at 26gr .3gr over max . FWIW Don't count on memory alone , always consult the manual and or your notes before starting . Before I noticed the problem , I had no problem thinking all was good . I kept thinking , Why is the OP using such low charges  The real question should have been . If the OP is so low , why am "I" so far off ?
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If Jesus had a gun , he'd probably still be alive ! I almost always write my posts regardless of content in a jovial manor and intent . If that's not how you took it , please try again .
Last edited by Metal god; June 8, 2015 at 02:08 AM. |
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June 8, 2015, 06:55 AM
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#28 | |
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Senior Member
Join Date: January 10, 2012
Posts: 3,881
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Quote:
I found the primer did not make much difference in velocity but did leave a cleaner barrel which I would attribute to a more complete burn of the powder. I am taking Jimro's advice and using mag primers from now on. Last edited by rebs; June 8, 2015 at 07:02 AM. |
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June 9, 2015, 12:40 AM
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#29 |
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Senior Member
Join Date: April 10, 2012
Location: San Diego CA
Posts: 6,876
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Went to the range today and worked up some H-335 loads
Rifle = AR with 16" barrel 1-7 twist 55gr Winchester FMJ-BT H-335 CCI # 400 LC- mixed brass OAL 2.240 , No crimp All shot at 100yds 24gr = Avg 2803fps ES-60/SD-22 , 2814 / 2768 / 2807 / 2828 / 2798 = 2.8moa 24.5gr = Avg 2872fps ES-37/SD-17 , 2854 / 2860 / 2879 / 2864 / 2892 = 1.9 moa 25gr = Avg 2936fps ES-73/SD-33 , 2927 /2911 / 2974 / 2900 / 2967 = 1.5moa 25.5gr = Avg 3006fps ES-75/SD-32 , 3060 / 2991 / 3007 / 2985 / 2985 = .9 moa 26gr = Avg 3130fps ES-17/SD-9 , 3135 / 3127 / 3121 / 3133 / 3138 = 2.6 moa - BUT 4 of the shots were 1 moa and 1 way out in never never land so I'd like to check that load out again and see if that was me . The ES & SD were really good with that load . I did not see any pressure signs but I had to be getting close or even over max with that load . I also loaded up some of those same loads using #450 primers . I stared 1gr lower (23gr ) . I only got to 24gr when I choose to stop because it was getting late and had some pistol loads I still needed to shoot . I'll post the complete results when I finish with the rest . I can tell you the 24gr load avg 2781fps ES-69/SD-29 = 2moa . Not really a whole lot different then the other 24gr load . I suspect the heavier charges will do more of the same .
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If Jesus had a gun , he'd probably still be alive ! I almost always write my posts regardless of content in a jovial manor and intent . If that's not how you took it , please try again .
Last edited by Metal god; June 9, 2015 at 09:33 AM. |
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June 9, 2015, 06:42 AM
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#30 |
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Senior Member
Join Date: January 10, 2012
Posts: 3,881
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Its odd that your 24.0 of H335 is not more accurate. 24.0 for me was very accurate in my rifle 1" @ 100 yds, 25.0 was another accurate load.
With CFE223 powder I found two accurate loads at 24.6 and 27.4 All loads are with Hornady 55gr soft points and LC brass. Another thing that surprised me was that once fired brass wasn't any more accurate than brass that I have loaded 5 and 6 times. |
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June 10, 2015, 10:10 AM
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#31 |
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Senior Member
Join Date: July 1, 2013
Location: Douglasville, Ga
Posts: 4,615
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That seems normal for my rifle. I have a 1:7 twist and always get more accurate the closer to max I get.
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My head is bloody, but unbowed |
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June 11, 2015, 08:08 AM
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#32 |
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Senior Member
Join Date: November 21, 2013
Location: New Hampshire
Posts: 1,695
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My max 16"bbl AR load using 55gr Hornady bulk with W748 ball powder was 26.8gr and my avg velocity was 2975 . This charge shot very inconsistent and poorly I only managed an average of 2.2 MOA .
I loaded up 25.6 gr of faster burn Benchmark powder and that avg was about 1.3 MOA and velocities were at about 3040 .
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"To be old an wise you must have been young and stupid" |
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