rayco3
.240 Incinerator
Posts: 76
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Post by rayco3 on May 15, 2012 11:30:07 GMT -5
Anyone have any load data using the 525 grainer in the .500 Wyoming Express? Maybe Lee? Thanks.
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Post by Lee Martin on May 15, 2012 15:46:16 GMT -5
Not sure about seating depth in the JRH but there should be room. If I get into a JRH this year I may try swagging these 525 WFNs to 0.500". -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by AxeHandle on May 15, 2012 17:22:34 GMT -5
I believe you will find the 500WE FA cylinder length a limitation. The 440s I load in mine are the absolute maximum. Haven't measured but they are commercial bullets so I'd expect them to have a .4 nose.
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sixer
.240 Incinerator
Posts: 78
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Post by sixer on May 15, 2012 19:27:15 GMT -5
Jeff Quin did some experiments with the 525gr in the .500WE, He said he abandoned it due to signs of excess pressure. The article is in the Gunblast archive. The comment on the load I received in an email.
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Post by Lee Martin on May 16, 2012 8:52:41 GMT -5
Remember guys, big bullets only cause excessive pressure if they're overloaded. They don't magically "create" PSI. Yes, they can spur faster spikes due to increased resistance. But anytime you go up in weight that happens (ex, 125's to 180's in a 357 Magnum). The obvious counter is going down in charge weight. Powder burn rate is equally, if not more, critical. Rule of thumb: bullet weight and propellant burn rate are inversely related. Heavier slugs require slower powder. Take the 45 Colt for example. Green Dot is fast stuff, even quicker than Unique. Works fine with bullets up to 270 grains or so. 300 and above and you're reducing the charge so much that performance falls off fast. And a little too much Green Dot and you will spike pressure. Now 300 - 390 grainers in the Colt shoot fine with slower powders. HS6 thru say AA1680. (H110/W296 is ideal for top velocity). There just seems to be this myth that it's dangerous to shoot really heavy bullets in handguns. And it's just that.....a myth. Consider this. Folks are safely using 400 grain pills in the 44 Magnum and 725 grains in the 500 S&W. Personally I find these weights to be way to big for those rounds. They're safe but lack the performance of lighter weights. 725's in the S&W won't out-penetrate 440 - 550s. They're prone to key-holding, they're less accurate, and they shorten the effective range of the gun. But through testing and common sense, safe loads have been developed for each. Years ago some warned against 500+ grains in the 500 Linebaugh. My 525 WFN combination suggests just the opposite. By using the appropriate powder and amount I've developed safe and accurate loads. No signs of excessive pressure and the cases fall out. I'll be chronographing these this weekend and will be curious to see what sort of spreads I get. Just a thought. -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by Lee Martin on May 16, 2012 9:03:05 GMT -5
And just so we're clear, this is Jeff Quinn's excerpt on the 525 in the 500 WE: "These are a few of the more interesting loads tested, in addition to the ones replicated from the Freedom Arms data. Of particular interest is the 525 grain Cast Performance bullet. I had thought that it would prove to be too heavy for the .500 WE case, but the velocity achieved with Lil’Gun is amazing. I stopped at the load listed, as the cases were just beginning to show sticky extraction, and are most likely over pressure, even though no other signs of high pressure were noted. If you decide to try this bullet, approach the load from well below, and proceed with caution" Jeff was actually impressed by the velocity. He did note the top load could be a little over on pressure (though no signs were noted, just sticky extraction). The simple fix? Play it safe and back down 0.5 - 1.0 grain. Again, the bullet wasn't unsafe. The charge weight may have been a tad high. -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by 500fksjr on May 16, 2012 20:03:50 GMT -5
It amazes me what the 500 L does at such relatively low pressures. +1 and it leaves you with a thought as to why one would keep many 45 Lc around when you can load up or down the 500 L with the same pressures....I am down to 1 45 and up to 4 500L with different configurations of Bbl lengths etc.. ;D |
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Post by 500fksjr on May 16, 2012 20:06:16 GMT -5
Lee and Whit...Thanks for the time and energy on this thread of 525s and .510 bore issues
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Post by Lee Martin on May 18, 2012 8:31:30 GMT -5
You're very welcome. I'm going to be chrono testing these loads and will post the results (26.0 of H110 with the 525 WFN). -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by cas on May 19, 2012 21:52:59 GMT -5
I played with the 525's some but didn't have any luck. I think the load I got from Tim Sundles was 25grs*, but I didn't like how the gun felt shooting them. (as it turned out when I tried that load I had a loose front grip frame screw, which I think is where the odd feel was coming from). Anyway… I think the load I stuck with was around 24? It shot great inside of 25 yards. I was all set to take it hunting that year so I tried some practice out at 50 yards… only to find I couldn't hit anything. They were wobbling all over, pitching and yawing. They just weren't stable. Not full on keyholes but clearly showing signs of tipping. Too long for the speed & twist I assumed, so I had a 500 gr mould made and drew it up to be as short as possible at that weight.
*Just came to edit this as I realized you guys AREN'T using the same powder I am.
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Snyd
.375 Atomic
The Last Frontier
Posts: 2,405
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Post by Snyd on Oct 23, 2012 18:55:24 GMT -5
Any update on the 26gr load Lee? Did you chrony it?
cas, who made your 500gr mould?
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Post by Lee Martin on Oct 23, 2012 20:06:23 GMT -5
I did. The 26 grain load went 1,080 from a 5" barrel. -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Snyd
.375 Atomic
The Last Frontier
Posts: 2,405
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Post by Snyd on Oct 23, 2012 20:49:48 GMT -5
That sounds just right Lee. At this point I'm leaning towards coming up with a 500+ plain base mould and hoping to be able to get 1100ish from a 5.5 barrel. I don't see any need for a gas check at that velocity. Thoughts?
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Post by wildwillalaska on Oct 23, 2012 23:16:00 GMT -5
Snyd, if interested I would certainly go in on a mold and material needed for casting if I could get one of those cute, heavy flat rate boxes out of the deal.
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Post by Seasons44 on Oct 23, 2012 23:48:56 GMT -5
I have a 500 linebaugh build in the near future and have contemplated to start casting, though between everything I have going on I have put it on the back burner.
Snyd, I don't cast right now ,I have very little in the past , but my shooting partner casts the few things I need.
I would go gas check mold , and this is just my opinion but the amount of powder you are burning a plain base mold will be "alloy sensitive". Meaning you may need a softer alloy then you desire for the bullet to shoot well. I may have a skewed view of this ( If so please correct me) but my preference is a gas check mold.
A 2 banger mold for Accurate would be my choice!
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