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Post by Encore64 on Oct 29, 2017 22:01:26 GMT -5
More good stuff from Fermin. I'll be back testing in a couple days.
The 25s are sure exciting stuff. Probably the most ever for me.
Got a few more projects on the drawing board. Need to start load pages for a reference book.
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paulg
.375 Atomic
Posts: 2,420
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Post by paulg on Oct 30, 2017 5:38:16 GMT -5
I think the bigger story here is, it seems Fermin has figured out how to post his pictures!! Way to go brother!! Love seeing and reading about your progress with your projects.
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Post by boolitdesigner on Oct 30, 2017 11:08:39 GMT -5
I will shoot another one for ya Bob as soon as I get my prescription fixed. It will take a while to get your prescription fixed with what you're having done. Just send that puppy up here with the dies and I'll get it going good for ya... hahahaha. I usually shoot WW296 and SR4759 in the 327 mag, 25-20 and 32-20. One of them will shoot well in yours. Thanks for the pic.
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Post by 2 Dogs on Oct 30, 2017 20:49:32 GMT -5
I went back thru the Hammer thread and fixed a bunch of those pictures. As I find time I need to fix this one and my big 32 thread too. Bunch of JERKS at PBUCKET for sure!!!
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Post by 2 Dogs on Oct 31, 2017 23:09:22 GMT -5
Ok, for Trick or Treat, we went back out to the range with H110 powder, CCI 450 Small Rifle Magnum Primers, and the Miha 257-640 GCHP bullets.
Unfortunately, this trip was complicated by not only pretty good wind gusts but dark heavy cloud cover and the threat of rain. Clouds are always hard to get chrono readings in but sometimes you can take the screens off and still pick up your speed. Sometimes you just get an error. I got quite a few errors. Here is my data, keep in mind all the cautions that apply with this information as it is only proven in my gun. I shot way more rounds than I was able to record speeds on. At the end of the day, I pulled my base pin. Bob's little marvel, even cast very soft, left my barrel lead free and with a nice lube star on the muzzle. More, since we have taken this little bullet this far, I did consult with Bob as to the proper alloy moving forward. Thanks Bob!
12.0 H110 CCI 450 1724 12.6 H110 CCI 450 1792/1861 13.1 H110 CCI 450 1780 13.7 H110 CCI 450 1892/1845 14.2 H110 CCI 450 1870/1880 14.7 H110 CCI 450 1933/1946/1989/1973/1923
I now know, when H110 gets to where it fills my 257 Jackrabbit case up to the base of the neck, my velocity will become more stable. 14.2 H110 is a compressed load, and the primers were fine and no hint of hard extraction at all. In fact it was looking so good, I decided to bump the load one more time. 14.7 was compressed to the point where the powder was pushing the little bullet back out of the case a tiny bit. I was crimping it just below the crimp groove. I wasn't worried about it because A) we already discovered that Bob's little wonders (the 640 series) don't care where you crimp them, and B) I had plenty of cylinder length to compensate for the longer OAL. This might not be true of a rechambered Ruger Single Six 22 cylinder.
What do you guys think now?
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Post by dougader on Oct 31, 2017 23:15:50 GMT -5
No setback, no flattened primers. I like the looks of that 14.2 grain load, Mr Two Dogs.
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Post by 2 Dogs on Oct 31, 2017 23:23:45 GMT -5
Wow, quite a jump in pressure with the CCI 450 and 2400. I was mainly thinking H110 when I brought up trying rifle primers. I don't recall where I read it exactly, Speer 13?, they talk about using std primers with AA9 and 2400 as the increase in chamber pressure was quicker than any significant increase in velocity. I think this was in 44 mag. Maybe some crossover here as well??? I am very interested to see how it goes with the 450 and H110 and Lil Gun. Your intuition was right on here. When you posted initially I wanted to agree with you. I figured however, I would let the gun tell us what the truth was as I worked up and down the burn rate chart. At any rate, your thoughts are appreciated and welcome as is your positive vibes! Helps alot!! I bet you thought I forgot about this post didn't you??? There are a couple other guys I discuss the finer points with during the day. They know who they are. Thanks. This is mixed in with running interference for guys who are trying to get their sixguns to behave with cast bullets. Those guys keep me grounded in the basics. Thanks for thinking of me. And then there are the guys who help me keep my soul where it needs to be. Again, thanks. All in all, a good day.
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Post by dougader on Nov 1, 2017 8:35:20 GMT -5
It takes time, hard work and perseverance to work through all the combinations to work up good loads. Sure, it's fun but it takes time, too, and time is at a premium these days. I appreciate you sharing your findings here, Fermin!
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Post by boolitdesigner on Nov 1, 2017 19:33:36 GMT -5
This might not be true of a rechambered Ruger Single Six 22 cylinder. When you guys gave me the parameters for the 257 JR, it was for the SS cylinder. The crimp groove was placed for a full length case with the meplat very close to the cylinder end with the base of the bullet at the base of the cartridge neck. I made it as long and heavy as it would go according to my design regimen.
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Post by 2 Dogs on Nov 1, 2017 21:33:06 GMT -5
This might not be true of a rechambered Ruger Single Six 22 cylinder. When you guys gave me the parameters for the 257 JR, it was for the SS cylinder. The crimp groove was placed for a full length case with the meplat very close to the cylinder end with the base of the bullet at the base of the cartridge neck. I made it as long and heavy as it would go according to my design regimen. Typical “without flaw” stuff. Kinda boring after awhile...HAHAHA Anybody wanna bet I could load it BACKWARDS and make it shoot? Only one little 32 detail Bob, we are missing the 640 design between the 115 and the 135 grainers. What sayeth ye oh cast slug wizard? And, if you wuz to be so bold as to update some of these ancient .257 designs, say something in the 70-80 grain range what might you suggest? At this point, from my experience, I’m wondering if a crimp groove in the smaller bores has any value.
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Post by cherokeetracker on Nov 1, 2017 21:56:19 GMT -5
Hollow Point?
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Post by cherokeetracker on Nov 1, 2017 21:59:02 GMT -5
More good stuff from Fermin. I'll be back testing in a couple days. The 25s are sure exciting stuff. Probably the most ever for me. Got a few more projects on the drawing board. Need to start load pages for a reference book. Please take many notes, and do make a reference book. I am not planning on a custom gun like Fermins. I am still wanting a Single Six, and I am still waiting upon one of your projects for sure.
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Post by Encore64 on Nov 1, 2017 22:06:19 GMT -5
More good stuff from Fermin. I'll be back testing in a couple days. The 25s are sure exciting stuff. Probably the most ever for me. Got a few more projects on the drawing board. Need to start load pages for a reference book. Please take many notes, and do make a reference book. I am not planning on a custom gun like Fermins. I am still wanting a Single Six, and I am still waiting upon one of your projects for sure. Have already started. Hoping Fermin will organize and share his end results so it can be included. Am sending a Stainless Bisley Single Six for conversion to a dual cylinder 25 caliber. Also, a co-conspirator and I have started the process of introducing another 25 caliber revolver round. I'd like to go all the way back to Glen Fryxell's 25 Hornet and compile data and experience.
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Post by 2 Dogs on Nov 1, 2017 23:00:24 GMT -5
Tank Hoover and I have discussed a “shared” works 357 project despite the fact that it is one of the more easily overlooked and underrated “medium” bores. Only by carefully and honestly searching every nook and cranny, every vehicle, by taxing our available platforms, gunsmiths, and bullet designers can we ferret out the best way.
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Post by cherokeetracker on Nov 2, 2017 8:45:15 GMT -5
Now here again I would be greatly interested. After finding out about the "Cast Performance" 180gr fitting the cylinder and the 357 case on my S&W 27 This was a game changer for me. I have always enjoyed the 357 and a Ruger 3 screw was my first pistol.
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