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Posted: 12/9/2014 12:29:06 AM EDT
| How much variation of weight is OK when sorting brass. I have mostly LC and WCC brass. I haven't loaded a lot of 50bmg yet but I haven't been satisfied with accuracy I've gotten out of my TAC 50. So far I've loaded with Hornady 750gr. I finally weighed some brass tonight and found up to 10gr variation within a brand and more between brands. |
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What all have you tried as far as loads go? How long is the round OAL, how far off the lands? Whats the powder charge? What kind of accuracy did you get from the different powder charges? What kind of prep did you do to the brass before loading it? Whats the OAL of the brass after FL sizing and then trimming?
Did you weigh the bullets and seperate them, I would keep them within à few grains of each other. Then load a few and see how they do, keep everything the same just vary the powder charge at first. Are you crimping or just seating the bullets in the case? Are you loading the bullets to fit into the TAC-50 mag or are you seating them long and loading them one at a time? Lot to think about but it will help get to your goal. Another thing to know about is that AMAX like to run between 2,600-2,800 FPS. So, break out a Chrony and see what your getting while testing your loads. Remember to keep records on all your loads that way theyre easy to load again. |
| Previous owners match data had an overall length that would not fit the magazine. I'll have to go back and look what he used for OAL on that load. Current load I'm working on is to fit the magazine. I'm putting on a crimp with this load for the magazine. I'll have to go back and measure OAL with them, but it's just deep enough to fit and feed in magazine. I'm averaging 2715fps with 220gr of H50. The Amax's I have are within a grain. I've seen posts about them not being consistent. I guess I'm thinking up to 10gr variation in case weight would equal enough difference in internal dimensions to effect accuracy. |
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After working my brass to what I cal Match Brass configuration, I weigh and place in order from lightest to heaviest, such that when shooting I have the least amount of variation from one piece to the next.
If large jumps in weight occur in lower or upper ends, they are sorted out to use for plinking. After priming ang "arming" the primer, I weigh powder charges out to within 0.1 grain total spread. Bullets are also weight sorted, whether heaviest to lightest or in equal weight batches. I try to seat bullet within 0.015" of rifling, but the biggest gain is concentricity of loaded round as presenting the projectile to the bore of the rifle. Consistency is the name of the game. Hornady Amax 750 prefers Hodgdon H50BMG in weights of 218 to 222 grains, pushing the hard does not work. Keep them under 2700 fps. |
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