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7 Rem mag R26 load data?
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<blockquote data-quote="codyadams" data-source="post: 1533372" data-attributes="member: 87243"><p>I have done quite a bit of load development with the 180 VLD and Reloder 26 in a factory Remington 700 long range. I'll give you my data before and after HBN coating....as always, WORK UP SLOWLY. Your gun could be much different.</p><p></p><p>Sorted Federal Brass</p><p>CCI 250 Primer</p><p>180 Berger HVLD</p><p>.015" off the lands in SAAMI chamber (around 3.500" if I recall....)</p><p></p><p>64.5 - 2793/2800/2794 - avg 2795</p><p>65.5 - 2894/2887/2892 - avg 2891</p><p>66.5 - 2923/2924/2936 - avg 2927</p><p>67.5 - 2987/2982/2998 - avg 2989</p><p>68.5 - 3018/3025/3027 - avg 3023</p><p></p><p>At 68.5, there was possibly a very faint ejector mark and but heavy bolt lift, pressure was getting up there I think because primers were slightly cratered. I didn't go any higher, because accuracy was just starting to go down anyway. We stuck with a load of 67.8 for a while, and was around 3015 fps. Brass had 4 fireings on it with this load and was fine.</p><p></p><p>Next we HBN coated them, and had to work up charges a little. DO NOT TRY THE TOP LOADS. They were hot even with HBN coated bullets. They would likely lock up a gun with naked bullets.</p><p></p><p>Federal Brass</p><p>CCI 250 Primer</p><p>180 Berger HVLD, HBN coated</p><p>.015" off the lands in SAAMI chamber</p><p></p><p>67.0 - 2955/2966/2978 - avg 2966</p><p>67.7 - 3015/2996/3002 - avg 3004</p><p>68.4 - 3035/3037/3058 - avg 3043</p><p>69.1 - 3069/3075/3074 - avg 3072</p><p>69.8 - 3130/3133/3131 - avg 3131</p><p>70.1 - 3158/3151/3143 - avg 3150</p><p></p><p>KEEP IN MIND THESE ARE HBN COATED, SO CREATE LESS PRESSURE. So I certainly found max on this work up. I started seeing pressure at 69.8 in the form of light ejector marks. But accuracy was extremely good, under half MOA, and was very consistent with only 3 fps e.s., and they were STUPID fast, so out of curiosity I tried the next load. I found that even with only .3 grains increase pressure signs raised significantly. Heavy bolt lift, shiny ejector mark, and cratered primers. Accuracy was still around half MOA though....just completely unsafe pressure.</p><p></p><p>We ended up loading 68.6 grains, and they are going 3050 fps, magneto speed and drop verified to 1660 yards. We have 2 more fireings with this load, primer pockets still tight. Here is what I would do to give myself a margin for saftey with a gun I don't know with the 175's:</p><p></p><p>Start at 64 grains or less, and work up 1 shot and 1 grain at a time, while chronographing, until you find your max pressure, you will find your max with under 6-8 bullets, I almost guarantee it. Then you can work your loads in .5 grain increments or so around the velocity range you want to be in that is still under max pressure.</p><p></p><p>Should get you close. Hope this helps.</p></blockquote><p></p>
[QUOTE="codyadams, post: 1533372, member: 87243"] I have done quite a bit of load development with the 180 VLD and Reloder 26 in a factory Remington 700 long range. I'll give you my data before and after HBN coating....as always, WORK UP SLOWLY. Your gun could be much different. Sorted Federal Brass CCI 250 Primer 180 Berger HVLD .015" off the lands in SAAMI chamber (around 3.500" if I recall....) 64.5 - 2793/2800/2794 - avg 2795 65.5 - 2894/2887/2892 - avg 2891 66.5 - 2923/2924/2936 - avg 2927 67.5 - 2987/2982/2998 - avg 2989 68.5 - 3018/3025/3027 - avg 3023 At 68.5, there was possibly a very faint ejector mark and but heavy bolt lift, pressure was getting up there I think because primers were slightly cratered. I didn't go any higher, because accuracy was just starting to go down anyway. We stuck with a load of 67.8 for a while, and was around 3015 fps. Brass had 4 fireings on it with this load and was fine. Next we HBN coated them, and had to work up charges a little. DO NOT TRY THE TOP LOADS. They were hot even with HBN coated bullets. They would likely lock up a gun with naked bullets. Federal Brass CCI 250 Primer 180 Berger HVLD, HBN coated .015" off the lands in SAAMI chamber 67.0 - 2955/2966/2978 - avg 2966 67.7 - 3015/2996/3002 - avg 3004 68.4 - 3035/3037/3058 - avg 3043 69.1 - 3069/3075/3074 - avg 3072 69.8 - 3130/3133/3131 - avg 3131 70.1 - 3158/3151/3143 - avg 3150 KEEP IN MIND THESE ARE HBN COATED, SO CREATE LESS PRESSURE. So I certainly found max on this work up. I started seeing pressure at 69.8 in the form of light ejector marks. But accuracy was extremely good, under half MOA, and was very consistent with only 3 fps e.s., and they were STUPID fast, so out of curiosity I tried the next load. I found that even with only .3 grains increase pressure signs raised significantly. Heavy bolt lift, shiny ejector mark, and cratered primers. Accuracy was still around half MOA though....just completely unsafe pressure. We ended up loading 68.6 grains, and they are going 3050 fps, magneto speed and drop verified to 1660 yards. We have 2 more fireings with this load, primer pockets still tight. Here is what I would do to give myself a margin for saftey with a gun I don't know with the 175's: Start at 64 grains or less, and work up 1 shot and 1 grain at a time, while chronographing, until you find your max pressure, you will find your max with under 6-8 bullets, I almost guarantee it. Then you can work your loads in .5 grain increments or so around the velocity range you want to be in that is still under max pressure. Should get you close. Hope this helps. [/QUOTE]
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7 Rem mag R26 load data?
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