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  • john.k's Avatar
    Yesterday, 11:08 PM
    Commonest source of PCB oil nowdays is old electric fans,especially overhead and the big standing fan units......the big capacitor that controlls motor speed swims in the stuff......In Germany after PCBs were banned ,a company cleaning casings and...
    24 replies | 745 view(s)
  • john.k's Avatar
    Yesterday, 05:48 AM
    Anyone who has worked in a refinery would have seen a safety demonstration of a high static charge set up in petroleum liquid just by pumping into a container.Fuel sold has a static dispersant added to eliminate static buildup.....The static charge...
    40 replies | 1769 view(s)
  • john.k's Avatar
    Yesterday, 05:34 AM
    With that load,you might be 'Bad Shoulder Wallace'
    7 replies | 223 view(s)
  • john.k's Avatar
    Yesterday, 03:26 AM
    john.k replied to a thread Post 64 Timeline help in Leverguns
    I find it very strange that Marlin could change from a flat sided ,close fitting bolt to a round one with big enough gaps to let small rodents crawl in,without causing shock and horror,yet changes in the 94 cause such angst.I have a 1973 Marlin...
    17 replies | 356 view(s)
  • john.k's Avatar
    Yesterday, 03:19 AM
    john.k replied to a thread Post 64 Timeline help in Leverguns
    I have read that the iron used has a high (by ductile iron standards) copper content as a grain refiner and heat treat modifier.This copper content affects solution bluing........As owners know,the recievers do rust,so I see no reason why they...
    17 replies | 356 view(s)
  • john.k's Avatar
    Yesterday, 03:05 AM
    Any kind of wild dogs bred with domestic dogs,especially very large dogs are a nightmare for farmers......They have all the cunning and savagery of wild dogs,but no fear of human scent....They dont restrict themselves to sheep,but tear cattle to...
    28 replies | 1189 view(s)
  • john.k's Avatar
    05-26-2018, 07:43 PM
    Ive seen new cars with machining swarf in gearboxes and other places.Often sticks to magnetic plugs on the first service,which is why the dealerships want to do the first service......they can hide from the bad publicity.
    8 replies | 214 view(s)
  • john.k's Avatar
    05-26-2018, 07:32 PM
    WJ,the bright colors are oxides of lead at high temp.....IMHO you are running too hot if your lead is oxidizing at that rate.Some powdered charcoal as top cover will reduce this oxiditation.The powder wont interfere with ladle casting ,if you use...
    39 replies | 561 view(s)
  • john.k's Avatar
    05-26-2018, 07:19 PM
    Interesting that powder coat works OK at 2000f/s(650m/s in EU)......I have never tried it at that speed for fear of "plasticing" the bore.It not conventional,but Ive found the performance of slow powders in reduced loads can be improved with an...
    14 replies | 455 view(s)
  • john.k's Avatar
    05-24-2018, 09:25 PM
    john.k replied to a thread Post 64 Timeline help in Leverguns
    The reciever is investment cast pearlitic ductile iron.....the pressed powder story refuses to die,despite it being impossible....... because a lot of simple firearm components are pressed/sintered powder.....Incidentally,the cast recievers have...
    17 replies | 356 view(s)
  • john.k's Avatar
    05-24-2018, 07:33 PM
    The biggest threat to lifespan of ally molds is sharp steel tools scraping lead smears .....if the mold is heated to melt temp,then no sharp tools are needed,just brush the metal off......One thing I have noticed is that beeswax acts as a flux for...
    13 replies | 310 view(s)
  • john.k's Avatar
    05-23-2018, 07:29 PM
    Start small with the oil......you can always remelt and add more ....IMHO,the big test of these lubes is will the powder be contaminated if the loaded ammo is stored for a week?
    19 replies | 569 view(s)
  • john.k's Avatar
    05-21-2018, 11:32 PM
    john.k replied to a thread Lead smear on block in Cast Boolits
    If you want blowholes ,buy a Chinese machine tool........sometimes quite important areas of iron turn out to be thick filler in blowholes......the China iron also tends to be so porous that it disappears if you try to fill it with any arc...
    32 replies | 996 view(s)
  • john.k's Avatar
    05-21-2018, 06:56 PM
    I think the lube has a lot to do with success.....my mix of waxes and oils is good in a lub/sizer,consistency like a soft putty,but melt the stuff and it sets as a hard wax,and doesnt stick until its worked again,when its very sticky.......no good...
    35 replies | 931 view(s)
  • john.k's Avatar
    05-21-2018, 04:49 AM
    mention of the Lee 405 HB...is the shape any good for say 500yds?..I was planning to get another and cut out the grooves to make a paper patch bullet for a 577/450.Alex Henry.
    65 replies | 1856 view(s)
  • john.k's Avatar
    05-21-2018, 04:24 AM
    john.k replied to a thread Lead smear on block in Cast Boolits
    Not a lead smear,but a repair to a blowhole in the iron with nickle rod.....I can see typical bubbles/slag pockets in the weld.
    32 replies | 996 view(s)
  • john.k's Avatar
    05-21-2018, 04:20 AM
    Very easy ...Ive resized loaded military 303 to fit a 30/40 95 Winchester by simply running a 8mm die down and setting back the shoulder about 1/8".
    63 replies | 10852 view(s)
  • john.k's Avatar
    05-20-2018, 10:36 PM
    You see some nice AK groups on car doors and screens ,bullets sideways at 50 feet.Still,result is the same.
    33 replies | 1827 view(s)
  • john.k's Avatar
    05-20-2018, 10:32 PM
    The size of cast bullets wont affect pressure,but will affect leading......far better oversize than under.I assume you have cleaned jacket fouling from the bore,and are using a hard alloy gaschecked.
    14 replies | 455 view(s)
  • john.k's Avatar
    05-20-2018, 02:59 AM
    Make brass ingots from your scrap copper and scrap zinc.......a little lead wont hurt for the kind of stuff rough brass is used for.Melting brass is not difficult,and a wood fired furnace with a blower is quite sufficient........be prepared for the...
    25 replies | 1021 view(s)
  • john.k's Avatar
    05-19-2018, 11:01 PM
    Hydraulic tubing is pretty hard and tough from cold drawing,but yield strength might be doubtful.........the problem with screwin chokes is,.... if they expand and jam in the gun......then you ve lost more than a bit of lathework.
    13 replies | 330 view(s)
  • john.k's Avatar
    05-19-2018, 10:55 PM
    Since the 93 barrel seats on the front of the action ring,its a natural for a relief cut in the old barrel........even if you might get $20 for a usable 7mm barrel,its not worth risking the reciever for that.....
    86 replies | 2634 view(s)
  • john.k's Avatar
    05-15-2018, 11:49 PM
    The haters are a bit prone to exaggeration ,or in this case underestimation......the current lee pin and socket type 2 cavity molds I have, have shown no ill effects from casting many thousands of bullets......I cast a potfull thru one mold each...
    43 replies | 1105 view(s)
  • john.k's Avatar
    05-12-2018, 02:23 AM
    john.k replied to a thread Bum micrometer? in Reloading Equipment
    I had a nasty shock with some of my jap mikes,the foam lining in the cases disintegrated and turned corrosive,pitting the plating on some of them.....the early Mitutoyos were OK cause they had metal boxes lined in velvet.I still have some of my very...
    22 replies | 790 view(s)
  • john.k's Avatar
    05-11-2018, 11:52 PM
    No company employee will give advice on anything anymore,they are lawsuit sensitive.....You try calling a steel supplier and asking what size beam you need for a project....no way will you get an answer.
    9 replies | 1000 view(s)
  • john.k's Avatar
    05-11-2018, 11:42 PM
    john.k replied to a thread Bum micrometer? in Reloading Equipment
    I have a Starret from WW2,which is 15-16" and navy marked,I was told they were issued for measuring the crankpins and journals of the engines in the Liberty ships.....Incidentally,notice Mr Morris has a set of testpieces with his mikes.....a...
    22 replies | 790 view(s)
  • john.k's Avatar
    05-10-2018, 09:06 PM
    The first thing a hobby machinist needs to learn is how to keep swarf well away from the domestic situation.
    106 replies | 13955 view(s)
  • john.k's Avatar
    05-09-2018, 11:46 PM
    If someone asks a question thats been asked before.....its "why dont you check the archive before bothering us"........when they do this its"resurrecting an ancient thread." Is three years really forever,is 2015 really ancient?
    106 replies | 13955 view(s)
  • john.k's Avatar
    05-09-2018, 11:37 PM
    With reference to #26,how can a .950 dia shank have a 27mmx2mm thread.....anyhoo,i suspect that is a soft conversion of 12 tpi,but if the barrel is made of a mild steel,its unsuitable for high pressure anyway.
    86 replies | 2634 view(s)
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About john.k

Basic Information

About john.k
Biography:
retired mechanic/engineer.
Location:
brisbane ,qld,australia
Interests:
shooting,machinery,bikes
Occupation:
retired

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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