When electronic sensors replaced copper pressure cups for testing ignition pressure. It was discovered that Unique reached peak pressure early in the duration of ignition, and that peak pressure was greater than what was calculated with the old CUP system. Changes and/or reductions in recommended charge weights followed.
When electronic sensors replaced copper pressure cups for testing ignition pressure. It was discovered that Unique reached peak pressure early in the duration of ignition, and that peak pressure was greater than what was calculated with the old CUP system. Changes and/or reductions in recommended charge weights followed.
Yeah, piezoelectric transducers give a clearer picture of the pressure curve over time versus CUP or LUP. It makes sense that powder manufacturers want to cover their bases against law suits.
Since a longer duration, lower pressure pulse can crush the cylinder as
much as a shorter duration, higher pressure pulse, CUP and LUP pressures
frequently register lower than actual peak pressures (as measured by a transducer) by up to 20%.
Never argue with stupid people, they will drag you down to their level and then beat you with experience -- Mark Twain How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
I'm no help fore SD loads I use factory ammo. Carry a .38SPL as my primary. I expect IF I had to use it it would be a short distance shot. Factory +P SD ammo Hornady or Federal.
I should clarify that using factory/commercial ammo in my CC guns is also about not being challenged that I "made and extra lethal load" to insure bodily injury or death. As I'm sure some attorney/DA would attempt to show as 'intent' of some kind.
Looking forward to it. Go test already, collect as much data as possible including velocity.
Never argue with stupid people, they will drag you down to their level and then beat you with experience -- Mark Twain How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
I'm impressed with the terminal performance. I kinda expected more petal shearing and loss of bullet weight but they held together really well.
I'm a little let down on the accuracy. Assuming you don't have a really long stride, 10 paces isn't too far. 5 inch groups, 3 inch groups. Any ideas why this could have happened? Shooter error or do you believe it's just the bullet?
Still, at bedroom distances, it would make a reasonable round. But I certainly would want to to see better accuracy.
Great info Knite. Thx. 👍
Never argue with stupid people, they will drag you down to their level and then beat you with experience -- Mark Twain How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
I just ordered 200 of these. I was waiting for reviews and they are all good so far. That, and free shipping. So, with great reviews and free shipping.......they are on the way.
It's this one (Discussion of this bullet starts at the bottom of page 2)
To make something simple is a thousand times more difficult than to make something complex.
-Mikhail Kalashnikov
Never argue with stupid people, they will drag you down to their level and then beat you with experience -- Mark Twain How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
Just went back through the thread and refreshed my memory, remembering why I ordered a box of these. It seems nobody has posted decent accuracy results with those bullets yet. I’ve got fingers crossed bullsi’s TG loads will be good. If the flush seated round is 4.2 grains, that might be on the warmer side with TG. But just going off memory.
I’ve got a couple other tricks up my sleeve. I’m getting ammo loaded for my annual 25 yard shootout. I’ve got some brand new 38 and 357 brass. I’ll try to get something stuck together and test while I’m getting my 25 yard stuff dialed in.
Just went back through the thread and refreshed my memory, remembering why I ordered a box of these. It seems nobody has posted decent accuracy results with those bullets yet. I’ve got fingers crossed bullsi’s TG loads will be good. If the flush seated round is 4.2 grains, that might be on the warmer side with TG. But just going off memory.
There is almost ZERO load data for 130GR jacketed bullets in 38spl. I went of 125gr loads for title group off the Hodgdon website at the lowest starting load. I’ll fire the first ones from an N-frame 357 just to make sure there are no pressure signs on the primer before I fire them through the Model 10s
To make something simple is a thousand times more difficult than to make something complex.
-Mikhail Kalashnikov
Should be fine, as long as you're not seating them flush. Having that big honkin' HP, they're: 1) LONG for their weight; 2) take up a LOT of room in the case; 2) have a lot of bearing surface.
I was surprised with the shape of my primers with 6.0gr of Unique in magnum cases. For reference Alliant lists 7.7gr of unique with a 158gr in 357mag
You think the seated flush ones would be unsafe? Because I did both. I can pull them no problem
To make something simple is a thousand times more difficult than to make something complex.
-Mikhail Kalashnikov
I think I would definitely rethink the flush seated loads. Your long loads seem fine. Gotta keep in mind, seating those flush is taking up a lot of space in the case, which will cause pressure to increase. Also, there’s a lot more bearing surface of the bullet contacting the case, so it will take more force to get the bullet to start moving. Those two things could cause pressure to spike. And title group is a powder than can spike quick anyway. I’d look more at load data for 148 grain wad cutters, since that’s basically what you’re building, just with a jacketed hp. Hog don says 3.6 as max load with with the 148 wc. That’s why I was thinking 4.2 might be a little on the warm side. Could be fine. But I’d be more inclined to start at 3.6 and maybe work up to 4. Keep in mind, .2 doesn’t sound like much. But with titegroup, the difference between starting and max load with the 148wc is 1/2 a grain.
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How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
Sometimes the best things in life are the simple pleasures
I should clarify that using factory/commercial ammo in my CC guns is also about not being challenged that I "made and extra lethal load" to insure bodily injury or death. As I'm sure some attorney/DA would attempt to show as 'intent' of some kind.
How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
Still pretty good for factory second bullets .
-Mikhail Kalashnikov
-Mikhail Kalashnikov
How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
-Mikhail Kalashnikov
-Mikhail Kalashnikov