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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Starting a custom light(ish) weight .338 Norma build!!
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<blockquote data-quote="codyadams" data-source="post: 1614715" data-attributes="member: 87243"><p>Ok, finally an update!! </p><p></p><p>Got a chance to do some load developement, started off with Ramshot Magnum, HBN coated Berger 300 grain EH's seated .015" off, CCI 250's, and peterson brass. I started at 86 grains and worked up to 94 grains in 1 grain increments, 2 rounds at each charge. I loaded 3 of the 86 grain load, as the first round in an hbn load and clean/treated barrel is generally higher pressure. All rounds were ran over my magneto speed. Though with only two shot groups it doesn't mean much, accuracy results were as follows:</p><p></p><p>[ATTACH=full]130106[/ATTACH] </p><p>And velocities were as follows:</p><p></p><p>[ATTACH=full]130107[/ATTACH] </p><p>On these loads, light ejector marks appeared at only 87 grains and 2650ish fps, but were very faint, needed to be held just right to even see them. Primers did not look very flattened, and as I worked up the marks barely got more noticeable, they never got to the point of smearing or even got a lityle shiny, there was never an increase in bolt lift, and velocities don't indicate being terribly high pressure, except maybe the last couple could be getting up there. </p><p></p><p>The loads I used are higher than published loads, but that is because with HBN you will be at a slightly higher powder charge (1-3 grains or so depending on cartridge) for the same pressure/velocity as a naked bullet, due to the bullet having less friction going down the bore, thus generating less pressure and needing more powder to generate the pressure. </p><p></p><p>So I'm not exactly sure what to make of the very faint ejector marks, when I size them I will measure to see if there was any primer pocket expansion. </p><p></p><p>Today I will do another load work up with three other powders, including Retumbo, H-1000 and Reloder 26 (26 may be too fast but I will find out) and loaded 7 of each in 1 grain increments working up. I have them loaded, and will go out today to shoot them and see what I end up with.</p><p></p><p>On a seperate note, recoil is very mild. I would say about like an unbraked 10-12 lb .308 or so. This T3 brake is phenominal!! Very sweet shooting rig, I would let my 13 year old niece shoot it without hesitation.</p></blockquote><p></p>
[QUOTE="codyadams, post: 1614715, member: 87243"] Ok, finally an update!! Got a chance to do some load developement, started off with Ramshot Magnum, HBN coated Berger 300 grain EH's seated .015" off, CCI 250's, and peterson brass. I started at 86 grains and worked up to 94 grains in 1 grain increments, 2 rounds at each charge. I loaded 3 of the 86 grain load, as the first round in an hbn load and clean/treated barrel is generally higher pressure. All rounds were ran over my magneto speed. Though with only two shot groups it doesn't mean much, accuracy results were as follows: [ATTACH=full]130106[/ATTACH] And velocities were as follows: [ATTACH=full]130107[/ATTACH] On these loads, light ejector marks appeared at only 87 grains and 2650ish fps, but were very faint, needed to be held just right to even see them. Primers did not look very flattened, and as I worked up the marks barely got more noticeable, they never got to the point of smearing or even got a lityle shiny, there was never an increase in bolt lift, and velocities don't indicate being terribly high pressure, except maybe the last couple could be getting up there. The loads I used are higher than published loads, but that is because with HBN you will be at a slightly higher powder charge (1-3 grains or so depending on cartridge) for the same pressure/velocity as a naked bullet, due to the bullet having less friction going down the bore, thus generating less pressure and needing more powder to generate the pressure. So I'm not exactly sure what to make of the very faint ejector marks, when I size them I will measure to see if there was any primer pocket expansion. Today I will do another load work up with three other powders, including Retumbo, H-1000 and Reloder 26 (26 may be too fast but I will find out) and loaded 7 of each in 1 grain increments working up. I have them loaded, and will go out today to shoot them and see what I end up with. On a seperate note, recoil is very mild. I would say about like an unbraked 10-12 lb .308 or so. This T3 brake is phenominal!! Very sweet shooting rig, I would let my 13 year old niece shoot it without hesitation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Starting a custom light(ish) weight .338 Norma build!!
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