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LT-31

Fuj said:
Bart.....You may have something there but I'll throw a twist
in the mix. (pun intended).....Back in the day, I had worked
with duplex and triplex loads in pistol cartridges. It was not
excepted until the 454 Casull came out. One particular powder
was too heavy to light off even with a magnum primer. The
trick was to dump in a few grains of fast pistol powder like
231, then some tissue, then the heavy charge. This lit things
up nicely......Now i would not recommend doing this in a rifle
case, but here's the twist.....Dump your charge of LT-30 first,
then your LT-32 on top of that. Seat to a compressed load to
"avoid" mixing the two powders.....Of course, I'm only putting
this out as experimental theory......Who knows !! Maybe light
off the slow powder first and let the faster powder do it's job
further down the barrel ?? As I say....Never let a bad idea go
to waste !!
Click to expand...
LT30 and LT32 Aren’t the kind of powders you want to get into compressed loads with. But I see where you’re going.

Bart
 
BartsBullets said:
One way to do it consistently, but a pain in the ass would be to use two Throwers. If you wanted 28 grains do 14 grains of each. No mixing, Pour one first and the second on top of the other.

Damn I might have to play with that tomorrow.
Click to expand...
Like I said before Bart all I would do if my load were 28 Grains just weigh out 14 grains of each, put it in a small bowl or cup mix it up and single load each case one at a time. That would be a true 50/50 mixture.
 
Ned Ludd said:
If the kernels are the approximately same size, uniform/even mixing is not a problem at all. Powder manufacturers mix different batches of the same powder whenever necessary and it's not a problem for them. It requires a little knowledge and attention to detail for the home reloader, but it's still a simple physical operation. In contrast, when the kernels are of noticeably different size, mixing powders is perhaps not such a good idea, and it may never be possible to mix them evenly, at least in a home setting.

So how do the kernel sizes of LT30 and LT32 compare?
Click to expand...

Burn rates can be changed by any one of three characteristics; composition, granulation and the coatings. Being physically similar may work but, does not guarantee even a homogenous mix/ blend would achieving the desired ballistic effect. Unfortunately General Dynamics SDS sheets only tells a part of the big picture.
 
K Hope said:
Burn rates can be changed by any one of three characteristics; composition, granulation and the coatings. Being physically similar may work but, does not guarantee even a homogenous mix/ blend would achieving the desired ballistic effect. Unfortunately General Dynamics SDS sheets only tells a part of the big picture.
Click to expand...
What does burn rate have to do with anything I said? I didn't make any claims whatsoever about the effectiveness of mixing powders. I only stated that it it is possible to mix powders uniformly/evenly that have kernels with fairly similar size/shape/weight...and it is possible.
 
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JimPag said:
Your not going to convince me that mixing even parts of both powders is going to come out 50/50 in every round that you load. Totally Impossible. There is always going to be a little more of one powder in every rou
Click to expand...

jackieschmidt said:
:)
this just might be the smartest thing said in this thread.
Click to expand...
I think the search is always on for the next best thing. This is just part of the search. Wouldn't it be nice to have a powder that would stay in tune all day, for instance or a couple hundred more FPS without pressure?
 
Murray Brook said:
@JimPag
I understand what you are saying and have to agree. If one powder had red kernels and the other had black ones I rarely believe you would get 20 red ones with 20 black ones for every load that needed 40 kernels
Click to expand...
Murray u gave me an Idea about when you said about if the kernels were colored red or black you could see the difference and I put it to the test a little while ago while I'm waiting for this damn snow to stop. I took 1000 grains of H4198 the green stuff and mixed it with Allie Euber's favorite H4198 the black stuff and mixed it together. I manually weighed out 28 grains to simulate loading it in a PPC case. I weighed enough to load 10 cases. I put 5 charges of 28 grains on 10 paper towels and spread them out. It was like I knew it would be all along. Some piles had more of the green stuff in it and others had more of the black kernels. Now anyone who knows about the black 4198 it's usually slower in fact by as much as 100 FPS slower. I mentioned this once before. I was at a match at Bell City in Southington, CT. There was a table with a bunch of reloading stuff that a guy brought to sell it because it was his brother's stuff and he had passed away. There was an 8 pound container of H4198 which had 7 pounds left in it for 50 bucks. Allie was in front of me and he picked it up and opened it and looked at it, put the cap back on and put it back down. I said to him , you don't want it? He said no because I'm looking for the black stuff. Well not letting a deal like that get away I scooped it up in a flash. I know this was just a dumb test but if your after consistency I don't see how it would be consistent if you have more slow powder in one case and more fast powder in another. I wish it was 70 degrees out here so I could run some loaded rounds thru a chronograph.
 
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JimPag said:
Murray u gave me an Idea about when you said about if the kernels were colored red or black you could see the difference and I put it to the test a little while ago while I'm waiting for this damn snow to stop. I took 1000 grains of H4198 the green stuff and mixed it with Allie Euber's favorite H4198 the black stuff and mixed it together. I manually weighed out 28 grains to simulate loading it in a PPC case. I weighed enough to load 10 cases. I put 5 charges of 28 grains on 10 paper towels and spread them out. It was like I knew it would be all along. Some piles had more of the green stuff in it and others had more of the black kernels. Now anyone who knows about the black 4198 it's usually slower in fact by as much as 100 FPS slower. I mentioned this once before. I was at a match at Bell City in Southington, CT. There was a table with a bunch of reloading stuff that a guy brought to sell it because it was his brother's stuff and he had passed away. There was an 8 pound container of H4198 which had 7 pounds left in it for 50 bucks. Allie was in front of me and he picked it up and opened it and looked at it, put the cap back on and put it back down. I said to him , you don't want it? He said no because I'm looking for the black stuff. Well not letting a deal like that get away I scooped it up in a flash. I know this was just a dumb test but if your after consistency I don't see how it would be consistent if you have more slow powder in one case and more fast powder in another. I wish it was 70 degrees out here so I could run some loaded rounds thru a chronograph.
Click to expand...

Jim,

I gave the Mix a try yesterday. I have some really hot N133 (2022). For example, 29.1 in 38-degree weather is going just over 3400. Trying a new barrel, I went everywhere with the Hot 133 and couldn’t get it to shoot. So I said, "Screw it." I have some really slow V133 (2001 vintage). I did a 50/50 mix, weighed out 6 ounces each, and put in a powder bottle, then shook it up for 5 minutes.

Loaded up 30 grains of mix and shot a .150 3-shot group. Bumped to 30.3 and shot a nice round zero. The 30.3 was going a hair over 3400 and had an ES of 4. Nothing scientific, but good news for me—the gun went from not shooting to shooting. I’ll have a better feel for it once I play with it more.


Maybe we should put Bryan “The Science Guy” Zolnikov aka Witch Doctor on it to test.

Bart
 
The burn rate difference between LT-30 and LT-32 is between 5-6%. That's less than the lot-to-lot variation in many powders. All of which is to say, any shot-to-shot variation in a batch of home-mixed LT-31 is likely to be lost in the noise. Doesn't mean that a tiny bit of variation isn't there. Just means that we'll never see it. We'll blame that barely missed X on our wind call, or something else.

I'm with @JimPag on this. Powders get mixed all the time in industrial applications. But a powder manufacturer is going to have both the equipment and the protocols to ensure anything they're mixing is properly and completely blended. And then they're going to apply a suite of quality control measures after the mixing to ensure the stuff going out the door is what they expect and intend.

Shooters have been mixing powders forever. More power to y'all who do.

For me, for a gun that matters, I figure there are already enough unknowns without me adding one more.
 
Jager said:
The burn rate difference between LT-30 and LT-32 is between 5-6%. That's less than the lot-to-lot variation in many powders. All of which is to say, any shot-to-shot variation in a batch of home-mixed LT-31 is likely to be lost in the noise. Doesn't mean that a tiny bit of variation isn't there. Just means that we'll never see it. We'll blame that barely missed X on our wind call, or something else.

I'm with @JimPag on this. Powders get mixed all the time in industrial applications. But a powder manufacturer is going to have both the equipment and the protocols to ensure anything they're mixing is properly and completely blended. And then they're going to apply a suite of quality control measures after the mixing to ensure the stuff going out the door is what they expect and intend.

Shooters have been mixing powders forever. More power to y'all who do.

For me, for a gun that matters, I figure there are already enough unknowns without me adding one more.
Click to expand...
The great thing about America is the right for each of us to be able to express our opinion. Thanks you for expressing yours. It's what makes conversations.

Pete
 
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