Red Dot
- Thread starter Mitty38
- Start date
fiver
Well-Known Member
hold up there on the not using it in the 40 case.
take a look at things first.
near 100% load density, speeds commensurable with what the round should be going, and pressures not quite at the top of the mapping window.
I mean if I had a 40 and was gonna replace herco with something else it'd probably be BE-86 which is a flipper flopper between herco and unique, only in the 40 it flops over to being herco.
[only flash suppressed]
the only way I'd change is if the powder was exhibiting some type of temperature sensitivity one way or the other.
I can totally see why waters liked Herco in the 40, there isn't too many other powder to cartridge combinations that just line up like that.
take a look at things first.
near 100% load density, speeds commensurable with what the round should be going, and pressures not quite at the top of the mapping window.
I mean if I had a 40 and was gonna replace herco with something else it'd probably be BE-86 which is a flipper flopper between herco and unique, only in the 40 it flops over to being herco.
[only flash suppressed]
the only way I'd change is if the powder was exhibiting some type of temperature sensitivity one way or the other.
I can totally see why waters liked Herco in the 40, there isn't too many other powder to cartridge combinations that just line up like that.
Joshua
Taco Aficionado/Salish Sea Pirate/Part-Time Dragon
So that makes sense. The 38 special has a lot of airspace, where the 40 has almost none. I’ve got to stop comparing apples and oranges. It’s the unique case volume, size, and shape, that sets up these weird secondary pressure wave scenarios.
I wonder if the Herco would be better behaved in the 38 special with a wadcutter pushed down all the way flush with the case mouth. If nothing else it creates a different set of conditions.
That is also why a increased loading density in the .357 has maybe a different effect on pressure.
Hmm, stuff to think about.
Josh
I wonder if the Herco would be better behaved in the 38 special with a wadcutter pushed down all the way flush with the case mouth. If nothing else it creates a different set of conditions.
That is also why a increased loading density in the .357 has maybe a different effect on pressure.
Hmm, stuff to think about.
Josh
CZ93X62
Official forum enigma
My Herco loads in Magnum revolvers have roughly 70%-80% density. I have seen zero weirdness in those applications--32 H&R, 357, 41, 44 Mags or 45 Colt in Rugers. Largely the same in 38 Special +P, the Herco at 90%-95% density. I have not tried it in 40 S&W, cast or jacketed.
fiver
Well-Known Member
exactly it's like making a cone shaped charge from an explosive like C-4 or plastique in something super fragile like a win bottle, and it blowing a small hole in a piece of steel even though the flat bottom was facing it.
you can get a secondary wave off the base [which is what your seeing]
I don't remember the name of the phenomenon [bichard's theorem maybe?]
you can get a secondary wave off the base [which is what your seeing]
I don't remember the name of the phenomenon [bichard's theorem maybe?]
RicinYakima
High Steppes of Eastern Washington
This is the latest, 2020, on secondary shock waves in confined spaces:
Shock wave propagation behavior at corners and crosscuts in …
scholarsmine.mst.edu › cgi › viewcontent
However, we must remember that this whole business of secondary shock waves is still theory, as we still don't know all that much about it.
The shaped charge, the Monroe Effect, has been worked out for over a hundred years and is most useful for engineering work in the military.
Shock wave propagation behavior at corners and crosscuts in …
scholarsmine.mst.edu › cgi › viewcontent
However, we must remember that this whole business of secondary shock waves is still theory, as we still don't know all that much about it.
The shaped charge, the Monroe Effect, has been worked out for over a hundred years and is most useful for engineering work in the military.
JWFilips
Well-Known Member
Mitty,
I use a Lot of Red Dot for "Low Node" shooting with my rifles! Seems to work best for the larger calibers however I Never get above 9 Gr
I do not like it for what has been called the "Universal Mil Surp load" ! It is to dang hot for my liking!
But I have gone as low as 3.5 grain w/ a 130 gr bullet in my 8 mm GEW and it is a quiet Chuck gun in my yard!
My 1916 Spanish Mauser shoots great groups with 8 Grains an a 180 Cast Bullet! of course all subsonic
in my 30 30 bolt gun 5 Grains with a 165 cast is excellent
I use a Lot of Red Dot for "Low Node" shooting with my rifles! Seems to work best for the larger calibers however I Never get above 9 Gr
I do not like it for what has been called the "Universal Mil Surp load" ! It is to dang hot for my liking!
But I have gone as low as 3.5 grain w/ a 130 gr bullet in my 8 mm GEW and it is a quiet Chuck gun in my yard!
My 1916 Spanish Mauser shoots great groups with 8 Grains an a 180 Cast Bullet! of course all subsonic
in my 30 30 bolt gun 5 Grains with a 165 cast is excellent