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    Forum: Our Town

    Dick Feynman, the famous physicist/mathematician,...

    Dick Feynman, the famous physicist/mathematician, once said that "if you can't explain your theorem to a cocktail waitress, you don't understand it yourself". The good doctors can do that. My knee...
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    1.5 grains of Bullseye, HP38, or W231. The model...

    1.5 grains of Bullseye, HP38, or W231. The model can hardly tell the difference. Of Unique go to 1.8 grains. Calculated pressure ~9,000 psi, (CIP method). MV in the 650 fps area from 4" barrel. ...
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    Just eyeballing it, I'd say the gap in mine is at...

    Just eyeballing it, I'd say the gap in mine is at least .015, and the end shake is close to that, too. These weren't target guns. Meant as "belly-guns", which one friend claims to mean that you...
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    @TheAbe - should have mentioned it - a drop or...

    @TheAbe - should have mentioned it - a drop or two of liquid dish detergent in a cup of water will reduce that meniscus problem.

    Your 7.4 grains is 30% more than what's in the QL database. ...
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    @TheAbe - should have mentioned it - a drop or...

    @TheAbe - should have mentioned it - a drop or two of liquid dish detergent in a cup of water will reduce that meniscus.
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    Fired only because it'll have the spent primer in...

    Fired only because it'll have the spent primer in place to keep the water in.
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    As of midnight I'm farther from reconciling the...

    As of midnight I'm farther from reconciling the QL models to Larry's data than I was before.

    But I can confirm that the SAAMI MAP is 17,000. and that the 12,000 figure quoted in that old Speer...
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    I just noticed the "hidden Hilda" button that...

    I just noticed the "hidden Hilda" button that pops up a window where the expansion ratio of the powder is displayed, so my previous post is already obsolete. :oops:
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    Looking forward, as I said, the .32 Colt data. A...

    Looking forward, as I said, the .32 Colt data. A cartridge I have much more experience with.

    One parameter I can only guess at is the seating depth those S&W cartridges use.

    Expansion ratio?...
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    Good point - the more hydrogen in the flux the...

    Good point - the more hydrogen in the flux the better. I think the sawdust idea is to keep air away, so that the flux isn't being used up combining with ambient oxygen.
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    The soda straw idea for the RCBS Junior works so...

    The soda straw idea for the RCBS Junior works so well that my white plastic catch tray is only 2" across. Permanently fixed, I empty it with a vacuum cleaner. Could be a little bigger - about one...
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    And stir it in vigorously. For the flux to work,...

    And stir it in vigorously. For the flux to work, it has to be mixed in with the lead. Fire on the surface takes its' oxygen from the air, which does you no good at all.
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    I've been trying ro reconcile Larry's numbers...

    I've been trying ro reconcile Larry's numbers with my Quickload models, and I can't even come close.

    Example: Winchester Western 86 gr Lubaloy LRN; 786 fps at 18,900 psi

    That pressure should be...
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    Um, sand won't go to the bottom of a pot of...

    Um, sand won't go to the bottom of a pot of molten lead.
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    Looking forward to the .32 Short Colt data, since...

    Looking forward to the .32 Short Colt data, since several of my "boys' rifles" use that round.
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    Forum: Our Town

    Definitely get 2nd and even 3rd opinions. Be...

    Definitely get 2nd and even 3rd opinions. Be aware that many surgeons rely on radiologists to interpret MRIs, and radiologists are sometimes pretty sketchy.

    I'm remembering the first "spinal...
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    Would need to know the PRECISE seating depth of...

    Would need to know the PRECISE seating depth of that Acme bullet to build up a QL model. Tiny cases are hyper-sensitive about seating depth.
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    I did that with a bit of brass tubing, but your...

    I did that with a bit of brass tubing, but your soda straw is better! Mine won't pass large primers reliably.
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    Forum: Our Town

    The more I experience medicine, the more I agree,...

    The more I experience medicine, the more I agree, but it's not the doctors' fault. It's the MBAs managing the hospitals, combined with the bureaucrats regulating them. Karl Denninger does a rant on...
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    Velocity is best predicted by the area under the...

    Velocity is best predicted by the area under the pressure/time curve. So longer but with a lower peak is indeed the holy grail. Thing is, little old revolvers have such short barrels that "longer"...
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    A chronograph does not tell you much about...

    A chronograph does not tell you much about pressure when it comes to comparing powders. Faster powders have to produce higher peak pressure to deliver a given velocity than will a larger charge of a...
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    The purpose of any flux is to grab the oxygen,...

    The purpose of any flux is to grab the oxygen, letting the pure metal go back into the melt. Lots of sawdust and rancid bacon grease would be my choice.
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    Would like a picture of that! I have my own way...

    Would like a picture of that! I have my own way of controlling "primer scatter" from the Jr., but it only works for small primers.
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    A lap for a round hole is almost always made so...

    A lap for a round hole is almost always made so it can expand to maintain fit as the hole diameter enlarges. Adjust so there is always some drag.

    ...
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    PC doesn't store well long term? What's the...

    PC doesn't store well long term? What's the failure mode?
Results 1 to 25 of 2500
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check