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Post by elkman1310 on Oct 30, 2016 15:07:39 GMT -5
As Richard said I must have more time then I know what to do with trying to make bullets. They are labor intensive but the results can be rewarding. Here is a 3 shot group I shot today . Same old stand by load out of my Shilen hunting rifle. 73grs of IMR 4198 a federal 209A primer and a stinky thick wool wad. Bullets are sized loose .4490 for this barrel
The bullet is made from 360 brass they are not for hunting only for target shooting. They have a 14 deg ogive and a hollow cavity base. I made some out of copper also which shot good but not like these brass bullets. I hope to test them at 600 yards next Sunday. The group was hard to measure but it came out to be .047 not bad for the first attempt.
  
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Post by doug136 on Oct 30, 2016 17:10:31 GMT -5
Impressive. Why do you call them a Hybrid ?
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Post by elkman1310 on Oct 30, 2016 18:07:20 GMT -5
Because they do not use a conventional flat base or a radius profile for the nose. So I call them a hybrid design. My goal for myself is to see how well they will shoot at 600 yards then move out to 1,000 yards. A 252gr won't cut it at 1K so I will just keep making it longer and heavier till I see signs of instability. I doubt if I can make a 300gr brass bullet shoot unless it was in a faster twist. Since brass is lighter than lead and jackets the projectile gets to long.
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Post by jims on Oct 30, 2016 18:51:57 GMT -5
fine shooting
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Post by hillbill on Oct 30, 2016 20:17:36 GMT -5
VERY INTERESTING!
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Post by mike on Oct 30, 2016 22:53:17 GMT -5
You got that right about your one hole group being hard to measure! You sir are a superb trigger man.
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Post by nyhunter on Oct 31, 2016 5:43:10 GMT -5
Very impressive, I look forward to your results.
Good luck
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Post by GMB54-120 on Oct 31, 2016 9:20:01 GMT -5
Because they do not use a conventional flat base or a radius profile for the nose. So I call them a hybrid design. My goal for myself is to see how well they will shoot at 600 yards then move out to 1,000 yards. A 252gr won't cut it at 1K so I will just keep making it longer and heavier till I see signs of instability. I doubt if I can make a 300gr brass bullet shoot unless it was in a faster twist. Since brass is lighter than lead and jackets the projectile gets to long. Im pretty sure a 300gr brass will stabilize but maybe not with the contour/ogive you are using. I know the Lehigh 305gr 458 works in a 1-28 50cal and 1-26 52cal with sabots. A friend had good luck with them in a 45cal 1-20. The Lehigh 305gr is 1.1" long I may have a few you could try if you can resize them. I should have the Match 300gr made for SOCOM and the 300gr CF made for 45/70. www.lehighdefense.com/collections/bullets/products/458-match-solid-300gr-bullet?variant=1073826204www.lehighdefense.com/collections/bullets/products/458-controlled-fracturing-305gr-bullet?variant=1073755480 |
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Post by doug136 on Oct 31, 2016 10:06:06 GMT -5
Are you smooth forming the bullets ?
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Post by elkman1310 on Oct 31, 2016 10:29:23 GMT -5
These bullets have a AOL of 1.305 which is long for a bullet of this weight. They are smooth sized or a bore rider bullet. I actually turn them as close as possible them polish them down to the diameter I need. When your working in 1/10th it doesn't take much to polish off a few 1/10ths.
On a good lathe your working with 1/2 thousands and with a quick change tool post if it doesn't repeat every time when you change tooling your always resetting your digital read out. I am making 10 more today for tests at 600 yards. I will stay with the same design for right now since it shot so well.
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Post by itneverends22 on Oct 31, 2016 13:13:56 GMT -5
Mighty fine shooting with those hybrids..
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Post by 68hunter on Nov 2, 2016 7:57:01 GMT -5
I have seen you shoot some very impressive groups but that was special. Maybe I'll be looking for a few lessons.
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Post by elkman1310 on Nov 2, 2016 10:53:30 GMT -5
I have shot some really small groups with my 6mm Dasher at 100 yards but that's a center fire with custom bullets. I hope these results I got with this brass bullet are repeatable. This was actually the smallest group I have ever shot with anything. Granted it is only 3 shots. I made 10 more to test at 600 yards if the conditions are good. I want to see what the B.C. might work out to be. Since these brass bullets have a different point of aim at 100 yards I need to get centered up and also check the velocity so I can get a good reading on drop. If they shoot good again I plan on making them a little longer and heavier. More bearing surface length would be a good thing. The new bullets are 1.315 AOL I won't to make some 1.500 and see what happens. I don't have anymore brass rod at the moment.
I will post results as they come available both good and bad to be fair and balanced.
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Post by GMB54-120 on Nov 2, 2016 17:00:57 GMT -5
This was an idea Lehigh was kicking around a couple years ago. I had some of the first prototypes but the actual bullet diameter was too large for my 45s. I never got to try the smaller ones. The bands are thin enough that if the base fits your bore it just takes a light smack to get them started. Bullet was only 220gr and was .978" long. UNS-c36000 brass IIRC  |
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Post by elkman1310 on Nov 2, 2016 19:16:11 GMT -5
That is similar to Leigh's bloodline bullet which Knight M/L sells and others. Brass has some draw backs when it comes to a hunting bullet. Hence the big open front cavity and very poor B.C. The bullets I am making are strictly for accuracy. If I can keep the weight between 250grs and 275 grs and get a real B.C. of .450 or maybe a little more that would be great. First order of business is repeatable accuracy.
I would like to be able to come up with a bullet under 300grs that has a high enough B.C. to get me on the target at 1,000 yards. the built must stay above the transonic zone. crazy things start to happen when a bullet slows down to around 1300fps. It would be easier if I could use a boat tail design but that is not possible so this is going to be a tall order.
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Post by GMB54-120 on Nov 2, 2016 21:19:09 GMT -5
The point i was making is maybe the REAL type bands will work for your bullets too. It would give you a little wiggle room on size of the actual bullet.
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Post by mooseman on Nov 3, 2016 6:43:51 GMT -5
I'd say good group was the under statement of the year. Impressive indeed
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Post by elkman1310 on Nov 3, 2016 7:31:59 GMT -5
They sealing bands are not a good idea for a long range bullet. They will cause more drag and wind deflection. A muzzleloader bullet drifts bad enough at 600 yards you don't need to introduce more problems with the use of the bands, I don't even size these. I bring the finial size to .4490 for this barrel by using 320grit paper. I can turn them to .4500 then I reduce the bearing surface with the 320 paper it goes really quick. But the whole process is very labor intensive to say the least. Even with a CNC it would be a two step process one to profile the bullet then to drill the hollow base.
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