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  • john.k's Avatar
    Yesterday, 11:16 PM
    The cartridge conversion carbines wernt popular,the complaint being the fired rimfire case was near impossible to remove from the chamber ,and needed a rod down the muzzle......Therefore ,I suspect a shotgun case which doesnt stay tightly expanded...
    7 replies | 226 view(s)
  • john.k's Avatar
    Yesterday, 11:01 PM
    The older Taiwanese lathes of this size(13x40) generally have an odd bearing on the spindle .....looks like a conventional taper roller ,but the outer race is also tapered on the OD fit into the casting.......these are no longer available ,just the...
    18 replies | 636 view(s)
  • john.k's Avatar
    Yesterday, 09:33 PM
    Always check if the fuel tank can breathe .....surging is often caused by partial fuel starvation ......It will have a "sealed vapor trap system " for pollution control ......making a small hole in the filler cap may solve the problem .......first...
    10 replies | 204 view(s)
  • john.k's Avatar
    Yesterday, 09:25 PM
    john.k replied to a thread Saving a riding mower. in Our Town
    My rider is locally made like tank,no pressed anything ,even the cutter spindle bearings are taper rollers in machined steel housings .......made in 1976,a bit of rust ,nothin but the Briggs will ever wear out,been rebuilt several times ....when...
    35 replies | 860 view(s)
  • john.k's Avatar
    07-01-2020, 07:04 PM
    john.k replied to a thread Grade 8 bolt hardness in Swaging
    The cheap Chinese Gr 8 bolts are the hardest IMHO,just a plain carbon steel .....softest HT bolts Ive seen would be Caterpillar ,no doubt high grade alloy steel........The cheap bolts need to be softened to work ,then simply rehardened by heating...
    4 replies | 383 view(s)
  • john.k's Avatar
    07-01-2020, 06:52 PM
    What about the type made of steel with the thread stuck out through the handwheel?...Ive got some of 1" bore ,I think ,part of a painting job ,never got included in the return shipment......Only catch is the pipe connection is smooth ,needs to be...
    28 replies | 794 view(s)
  • john.k's Avatar
    06-30-2020, 07:13 AM
    I read a military report on faulty blackpowder(big guns still use blackpowder today),and the conclusion was that the problem was caused by degradation of the blackpowder ,caused by polluted water used in the damping down phase of manufacture ,and...
    10 replies | 246 view(s)
  • john.k's Avatar
    06-30-2020, 07:04 AM
    The cyanide solutions do degrade over time .....Ive long used a cyanide plating bath for increasing the size of steel bearings ,to restore a tight fit......saves many dollars in machine work .....Anyway ,cut a long story short ,grandkids got to the...
    31 replies | 1777 view(s)
  • john.k's Avatar
    06-24-2020, 12:27 AM
    Yehb ub is right ,Cr V marked screwdriver shaft is magic for pins etc......and free if you save all the old screwdrivers.......Ive also used Unbrako bolts for material .....these fasteners were made in Germany from some sort of super alloy...
    12 replies | 370 view(s)
  • john.k's Avatar
    06-24-2020, 12:17 AM
    john.k replied to a thread Pitted Chamber fix in Special Projects
    Yes ,I would try electroless nickle plating .....but the chemicals are expensive ,and the solutions dont last like electroplating solutions .....so unless you have a lot of nickle to do ,not economical ........Mention of hardchrome ....indeed a...
    24 replies | 1589 view(s)
  • john.k's Avatar
    06-23-2020, 12:51 AM
    john.k replied to a thread Lead Lapping in Leverguns
    If not familiar with the pitfalls ,the muzzle can be bellmouthed ,ruining accuracy......Its also possible to get a jam with a too tight lap and grit ,and have a considerable obstruction.......What surprised is that marlins "Deep grooved Ballard...
    11 replies | 491 view(s)
  • john.k's Avatar
    06-23-2020, 12:45 AM
    You can fire oversize bullets no problem, but if you eject a loaded round ,the bullet stays put and the powder spills into the action ,causing a jam until every last kernel is removed ......In fact ,I found it easier to pour gasoline through the...
    21 replies | 680 view(s)
  • john.k's Avatar
    06-23-2020, 12:38 AM
    I believe Snap On make a range of "spline drive" tools ,wrenches, sockets ,etc .....however its quite obvious Lee doesnt intend high duty wrenches to be used to over torque and break their components.
    38 replies | 1152 view(s)
  • john.k's Avatar
    06-22-2020, 01:27 AM
    john.k replied to a thread Barrel Maker? in "The Barrel Works"
    F class shooter at one time used 1 in 14 twist for 308/7.62 Nato with the 147gn service type bullet......good for 1000 metres,trans sonic just beyond,so no good at 1100m....1 in 12 is good for up to 180 gn bullets in 30 cal.,the 1 in 10 military...
    13 replies | 1761 view(s)
  • john.k's Avatar
    06-22-2020, 01:09 AM
    john.k replied to a thread Pitted Chamber fix in Special Projects
    I would say solder would be satisfactory at the pressure of 50/70.....its all very well talking about yield strength,but in a filled pit,where is the solder going to go?......Provided the solder has no escape route ,its the same result as ...
    24 replies | 1589 view(s)
  • john.k's Avatar
    06-20-2020, 09:30 PM
    john.k replied to a thread Old smokey in Our Town
    If you want the carbide to last in storage ,store in a tin of kerosine ....I think carbide is still stocked by some hiking /camping/explorer type shops...at very high price.
    13 replies | 1092 view(s)
  • john.k's Avatar
    06-20-2020, 09:24 PM
    Friend of mine had a truck used to lock brakes on one wheel ......its the bearings causing it ,he says.......How s that?......Well ,he says ,each time a wheel cylinder starts to leak ,I put a ball bearing in the hose fitting.....so its the three...
    11 replies | 1089 view(s)
  • john.k's Avatar
    06-20-2020, 03:17 AM
    There are some pics of split barrels on new Tikka rifles on the net.........all steels can have flaws ,and generally careful checks find the faulty blanks ......Ive read that Spanish Mauser barrel blanks were hydraulically tested at very high...
    74 replies | 11578 view(s)
  • john.k's Avatar
    06-19-2020, 02:04 AM
    I made a single shot 54 using shortened 28ga shotgun plastic cases ,and decided to proof it with a case full of 296 and a 500gn bullet......the steel sheet head of the shotgun case went into a flat disc between the block and barrel.....completely...
    114 replies | 16802 view(s)
  • john.k's Avatar
    06-18-2020, 08:46 PM
    john.k replied to a thread Welding advice ? in Our Town
    Any kind of wirefeed needs regular use ...or it simply wont work......The beauty of the stickwelder is it works after a 6 month layup ,rods left on a shelf in an opened packet .....conditions maybe not ideal ,but still good enough for average steel...
    47 replies | 1504 view(s)
  • john.k's Avatar
    06-17-2020, 08:50 PM
    Cordite wasnt the only smokeless powder available commercially in 1900.....every maker had their own brands and types.....the Euro military rounds were generally loaded with a a coarse diamond flake powder ,originally invented by the French in...
    26 replies | 1402 view(s)
  • john.k's Avatar
    06-17-2020, 08:35 PM
    Whats wrong with simply rethreading .....small ring Mauser is about .1" smaller than a large ring ,same TPI ,so rethreading is a very simple project......I might also observe if the guy had trouble removing a small ring Mauser barrel ,seems likely...
    34 replies | 1103 view(s)
  • john.k's Avatar
    06-15-2020, 08:41 PM
    Funny everyone says they dont handle gas well ,which is true.....but the Mannlicher of legend is a straight copy and Mannlicher didnt bother putting the little tab on the striker nut ,so any gas ,brass,or ejector bits will hit you in the face ,even...
    20 replies | 1637 view(s)
  • john.k's Avatar
    06-15-2020, 08:20 PM
    john.k replied to a thread Time for a reline? in Leverguns
    If the rifling within one inch of the muzzle is gone ,it will not shoot accurately .....and with old guns this is the common area for damage with rods ,pullthru s ,and insect deposits ...and be very wary of hammering slugs thru the bore ......I dont...
    17 replies | 572 view(s)
  • john.k's Avatar
    06-15-2020, 08:00 PM
    A small size Martini (cadet) has a 3/4" barrel tenon,IMHO too small for a case of larger diameter than .375"............If you want a Martini for larger cases ,get a Martini Enfield.
    10 replies | 553 view(s)
  • john.k's Avatar
    06-14-2020, 04:26 PM
    john.k replied to a thread Welding advice ? in Our Town
    Ive done lots of welding ,like maybe used tons of rods in big tins,and I never cease to be amazed at the little shoebox sized "inverter welders"........In the old days ,crowd I worked for had a Italian "Essetti" inverter ,the thing cost like...
    47 replies | 1504 view(s)
  • john.k's Avatar
    06-12-2020, 08:55 PM
    john.k replied to a thread E85 gas in Our Town
    Easily seen because big sugar and big starch/grain /beet is the driver behind adding ethanol ,and is the money behind political campaigns to include the stuff .........incidentally ,oil refiners/fuel producers hate the stuff because all the rusting...
    66 replies | 1871 view(s)
  • john.k's Avatar
    06-12-2020, 08:14 AM
    Thing learned pretty quick with wood fired melting is smoke makes your eyes water .....so you should include an effective flue in the build......or use charcoal fuel exclusively.
    12 replies | 699 view(s)
  • john.k's Avatar
    06-09-2020, 06:40 PM
    That would be a 308 fired in a 270 chamber ......and 303guys #1 pic is a scope collimator spud left in the bore (for safekeeping?)
    74 replies | 11578 view(s)
  • john.k's Avatar
    06-09-2020, 01:25 AM
    Unless you are an experienced machinist.,I would suggest you try lapping the threads together with fine (400grit) lapping paste........Barrel threads are quite soft and one pass with an incorrect die ,and you will have a very loose barrel/tenon...
    6 replies | 372 view(s)
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About john.k

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About john.k
retired mechanic/engineer.
brisbane ,qld,australia


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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