Much better day at the range


Strut10

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Back to the bench this morning with 2 more batches of reloads. Another grain of IMR-4320 (81.0 gr) turned in 2945 fps and a 5.0" 5-shot group at 100 yards. frown.gif The second batch was 92.0 gr. of H-414 at 2965 fps and printed a 1.4" 5-shot group at 100 yards. laugh.gif Now, that's more like what I'm talkin' about! grin.gif More work to do. But, I'll be able to sleep at night with those initial results. wink.gif

DSC02230.JPG

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Re: Much better day at the range

More better! Looks like it is comming together. Now see how it will average. It does not seem to be a maximum load as the velocity only jumped 20 fps with a grain increase in powder. You may still have room to go up.

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Re: Much better day at the range

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It does not seem to be a maximum load as the velocity only jumped 20 fps with a grain increase in powder. You may still have room to go up.

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AJ........

The group pictured was the 92.0 gr. H-414 load.......not the 81.0 gr IMR-4320 load. The 4320 turned in a horrid 5.0" group. I have not given up on the 4320 yet. There's no signs of pressure and I still have some airspace to get rid of. So I've already got another batch of those loaded (a bit heavier) and ready to go. The H-414 load, although, supposedly 1 gr. under max, seems pretty darned hot. No cratering on the primers. But they are flattening moderately. Also threw a batch together with some IMR-4350, too. Hope it's not as dog-slow as the Accurate Arms XMR-4350 was.

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Re: Much better day at the range

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Have you tried any Reloader 22?

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Reloader 22 is a little on the slow-burning side for this round. It's different from the other magnums I've loaded for thus far. It burns a ton of powder. But it's got a really big hole to shove it all out. So it takes a faster burning powder than, say, a 7mm STW or a .300 Ultra-Mag type case. Reloader 15 or 19 ought to be good choices, though. And I aim to try them before this experiment is all over. wink.gif

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